OS Part 2

Operating System and Linux MCQ
for COMPETITIVE exams

QuestionID  :  11316         Subject Name  Linux

Q1. Functions defined in the current shell are available to all the subshell invoke from the current shell

Correct Answer : F

QuestionID  :  11325         Subject Name  Linux

Q2. OPTIND and OPTARG are unix defined variables.

Correct Answer : T

QuestionID  :  11332         Subject Name  Linux

Q3. Setting made using stty in a shell script are effective only during the execution of the script.The orignal setting are restored the moment excution of the script is over.

Correct Answer : F

QuestionID  :  11333         Subject Name  Linux

Q4. we can trap a signal such that on occurence of that signal a particular shell script gets executed.

Correct Answer : T

QuestionID  :  11336         Subject Name  Linux

Q5. Binary executables required for system administration are usually placed in /etc.

Correct Answer : T

QuestionID  :  11339         Subject Name  Linux

Q6. An exported variable cannot be unset

Correct Answer : F

QuestionID  :  11344         Subject Name  Linux

Q7. To list hidden as well as normal files in thr current directory the command you would use is--

1.  ls - a

2.  ls - b

3.  ls - l

4.  None of above.

Correct Answer : 1

QuestionID  :  11352         Subject Name  Linux

Q8. who is a special case of who am i command.

Correct Answer : F

QuestionID  :  11356         Subject Name  Linux

Q9. While executing a script the shell acts as a compiler

Correct Answer : F

QuestionID  :  11365         Subject Name  Linux

Q10. A PC having its own harddisk and memory continue to use them when it is acting as a terminal for a host machine.

Correct Answer : F

QuestionID  :  11366         Subject Name  Linux

Q11. All device related files are present in /dev directory.

Correct Answer : T

QuestionID  :  11373         Subject Name  Linux

Q12. A kernel program is usually stored in a file called sh.

Correct Answer : F

QuestionID  :  11375         Subject Name  Linux

Q13. Shell program is usually stored in a file called Unix.

Correct Answer : F

QuestionID  :  11383         Subject Name  Linux

Q14. What would be the output of the following? echo Hello eval echo Hello eval eval echo Hello echo${newname+Arora}

1.  Hello Hello

2.  Error

3.  none of the above

4.  Hello Hello Hello

Correct Answer : 4

QuestionID  :  11385         Subject Name  Linux

Q15. All the utilities, applications, directories and data in Unix are stored as files.

Correct Answer : T

QuestionID  :  11388         Subject Name  Linux

Q16. The file that controls the printer is stored in a sub-directory called printer created by system admin.

Correct Answer : F

QuestionID  :  11397         Subject Name  Linux

Q17. Read,write,execute permissions to a file created by you can be alter by other user

Correct Answer : F

QuestionID  :  11409         Subject Name  Linux

Q18. How would you perform the following operations on the contents of a given file. insert a> and a space at the start of every line in the file

1.  1,$s/^/>[][]/g

2.  1,$s/>[][]/g

3.  1,$s/^/>[]/g

4.  none of the above

Correct Answer : 1

QuestionID  :  11410         Subject Name  Linux

Q19. If in a script value of IFS is changed to : after execcution of script the value of IFS is automatically set back to original value

1.   True

2.   False

3.  Can not say

4.  Partly True Partly False

Correct Answer : 4

QuestionID  :  11425         Subject Name  Linux

Q20. Purpose of .exrc file is convinient way to customize the vi environment and like all good things you shold put it to utmost use to improve your efficiency .

Correct Answer : T

QuestionID  :  11432         Subject Name  Linux

Q21. What is the output of following program segments? a=b b=c d=c echo $$b echo $$$d

1.  521b 521c

2.  512b 512c

3.  100b 100c

4.  none of the above

Correct Answer : 1

QuestionID  :  11441         Subject Name  Linux

Q22. Unix uses serial multitasking to support various programs running in memory

Correct Answer : F

QuestionID  :  11463         Subject Name  Linux

Q23. the command used for flip the case from upper to lower or vice versa....... is ~

Correct Answer : T

QuestionID  :  11466         Subject Name  Linux

Q24. echo statements output can be redirected to file

Correct Answer : F

QuestionID  :  11470         Subject Name  Linux

Q25. Comments can be spilt over multiple lines if each line is preceded by #

Correct Answer : T

QuestionID  :  11474         Subject Name  Linux

Q26. to delete 5 lines from file & to copy them to buffer x we use "x5dd

Correct Answer : T

QuestionID  :  11479         Subject Name  Linux

Q27. The following command going to do? at 0915am Mar 24 echo "Good Morning" ctrl d ------------------------------------------ o/p: On march 24 at 9.15 am it will print "good morning" on the screen

Correct Answer : T

QuestionID  :  11484         Subject Name  Linux

Q28. If the printer goes out of order the system administrator can ensure that the system refuses to accept new printing job

Correct Answer : T

QuestionID  :  11486         Subject Name  Linux

Q29. Only system adminstrator can cancel your printing job

Correct Answer : F

QuestionID  :  11492         Subject Name  Linux

Q30. The file /bin/sysadmsh can be executed only by the system admin.

Correct Answer : T

QuestionID  :  11495         Subject Name  Linux

Q31. which of the following assignment is illgal

1.  a=`ls`

2.  b=`ls-l`

3.  c=`1972`

4.  d=`who|grep aal`

Correct Answer : 3

QuestionID  :  11496         Subject Name  Linux

Q32. When fork() is given

1.  It creats a child process

2.  Allocate slot in process table

3.  returns 0 to parent & ID to child

4.  All of the above

Correct Answer : 4

QuestionID  :  11506         Subject Name  Linux

Q33. For a person to receive messages he should have his terminal set to a parameter which will allow him receive messages. The command to set this parameter is

1.  message -on

2.  msg -o

3.  mesg -y

4.  message -y

Correct Answer : 3

QuestionID  :  11509         Subject Name  Linux

Q34. we can change the prompt to What Next while using the more command

Correct Answer : F

QuestionID  :  11513         Subject Name  Linux

Q35. The shell meta character $# represents

1.  total number of arguments supplied to the shell script

2.  total number of files in the current directory

3.  total number of users who have logged in

4.  total number of process running in the background

Correct Answer : 1

QuestionID  :  11518         Subject Name  Linux

Q36. There is no need to make file system on a disk if we are going to use it only to back up files on it.

Correct Answer : T

QuestionID  :  11524         Subject Name  Linux

Q37. A file system can be mounted and unmounted by any user.

Correct Answer : F

QuestionID  :  11527         Subject Name  Linux

Q38. A floppy can be formated only by system administrator

Correct Answer : F

QuestionID  :  11528         Subject Name  Linux

Q39. On executing a statement set -3+1

1.  $1 would be -3

2.  $1 would be -

3.  $1 would be set

4.  this command would result into an error

Correct Answer : 4

QuestionID  :  11540         Subject Name  Linux

Q40. if there are number of file systems then each one will have its own block

Correct Answer : T

QuestionID  :  11551         Subject Name  Linux

Q41. A tar command is can be used to list all the backed up files present on floppy disk.

Correct Answer : T

QuestionID  :  11556         Subject Name  Linux

Q42. Unix commands which accept the input from standard input device and send the output to the standard output device are known as filters.

Correct Answer : T

QuestionID  :  11559         Subject Name  Linux

Q43. k=35 echo `[$k -eq 35 ] ``[$k-eq 50]`

1.  blank line

2.  dotted line

3.  error

4.  none

Correct Answer : 1

QuestionID  :  11562         Subject Name  Linux

Q44. i=4 z=12 [$i=5 -a $z - gt5] echo $?

1.  1

2.  0

3.  none

4.  error

Correct Answer : 1

QuestionID  :  11566         Subject Name  Linux

Q45. To perform the numeric test we must use -ge instead of >=

Correct Answer : T

QuestionID  :  11572         Subject Name  Linux

Q46. cat < file1 > file2 cat > file2 < file1 Both the commands will show the same result.

Correct Answer : T

QuestionID  :  11575         Subject Name  Linux

Q47. what are the contents of the file /usr/lib/cron/at.deny ?

1.  list of users who are currently logged in "at" the current instant

2.  list of users who are not allowed to use the "at" command

3.  both the above

4.  none of the above

Correct Answer : 2

QuestionID  :  11582         Subject Name  Linux

Q48. the if-then-fi instruction are loop control instruction

Correct Answer : F

QuestionID  :  11600         Subject Name  Linux

Q49. A file can have links across file system.

Correct Answer : F

QuestionID  :  11611         Subject Name  Linux

Q50. The command cut -f 2,8 -d":" file1 would output

1.  the fields 2 to 8 from file1 where deliminator between fields is :

2.  the fields 2 to 8 from file1 including the deliminator : between fields

3.  the columns 2 to 8 from file1 with : between each column

4.  none

Correct Answer : 1

Top of Form

QuestionID  :  11323         Subject Name  Linux

Q1. OPTIND and OPTARG are unix defined variables.

Correct Answer : T

QuestionID  :  11327         Subject Name  Linux

Q2. If shell script is called from antohter then the called shell script should necessarily have a return statement.

Correct Answer : F

QuestionID  :  11330         Subject Name  Linux

Q3. An argument to the option cannot begin with a minu sign.

Correct Answer : F

QuestionID  :  11340         Subject Name  Linux

Q4. Hidden files in Unix always begin with a character " . "

Correct Answer : T

QuestionID  :  11353         Subject Name  Linux

Q5. The shell performs command substitution before filename substitution

Correct Answer : F

QuestionID  :  11366         Subject Name  Linux

Q6. All device related files are present in /dev directory.

Correct Answer : T

QuestionID  :  11369         Subject Name  Linux

Q7. what would be the output of the following program: name=Sanjay surname=khare echo{name=rahul} echo{middlename+Rahul} echo${surname-Arora}

1.  Sanjay Blank line Khare

2.  Khare Blank line sanjay

3.  error

4.  none of the above

Correct Answer : 1

QuestionID  :  11379         Subject Name  Linux

Q8. What would be the output of the following? name=Sanjay surname=khare echo${name-Rahul} echo${middlename-Rahul} echo${surname+Arora} echo${newname+Arora}

1.  Sanjay Rahul Arora Blank line

2.  Blank line Sanjay Arora Rahul

3.  error

4.  now of the above

Correct Answer : 1

QuestionID  :  11394         Subject Name  Linux

Q9. How would you perform the following operation on the contents of a given file. Replace one or more spaces with a single space

1.  1,$s/[][]*/[]/g

2.  1,$s/[]*/[]/g

3.  1,$s/[][]+/[]/g

4.  1,$s/[]+/[]/g

Correct Answer : 1

QuestionID  :  11401         Subject Name  Linux

Q10. Using for loop we can calculate factorial value .

Correct Answer : F

QuestionID  :  11402         Subject Name  Linux

Q11. How would you perform the following operations on the contents of a given file. Replace one or more spaces following a fullstop or a comma with two spaces

1.  1,$s/[.,][][]*/[][]/g

2.  1,$s,[.][,][][]*/[][]/g

3.  1,$s/[.,][]*/[]/g

4.  1,$s/[.,][][]+/[]/g

Correct Answer : 1

QuestionID  :  11410         Subject Name  Linux

Q12. If in a script value of IFS is changed to : after execcution of script the value of IFS is automatically set back to original value

1.   True

2.   False

3.  Can not say

4.  Partly True Partly False

Correct Answer : 4

QuestionID  :  11421         Subject Name  Linux

Q13. To logout from your terminal you

1.  Switch off the terminal

2.  Press ctrl -d or type exit

3.  press ctrl-Alt-Del

4.  do nothing it is the system administrator who would do this for you

Correct Answer : 2

QuestionID  :  11422         Subject Name  Linux

Q14. The difference between the commands ps -e and ps -a is

1.  ps -e gives detail of every process running in memory whereas ps -a gives output for all the process that you have launched.

2.  ps -e gives details of every process running in memory whereas ps -a gives details of all user processes.

3.  No difference,both give same output.

4.  None of the above.

Correct Answer : 2

QuestionID  :  11423         Subject Name  Linux

Q15. A single UNIX file System can be split over multiple harh disks

Correct Answer : F

QuestionID  :  11424         Subject Name  Linux

Q16. What is the output of following program segments? n="ask me" echo $n echo "$n" echo `$n`

1.  ask me ask me $n

2.  ask me $n ask me

3.  ask me

4.  $n

Correct Answer : 1

QuestionID  :  11425         Subject Name  Linux

Q17. Purpose of .exrc file is convinient way to customize the vi environment and like all good things you shold put it to utmost use to improve your efficiency .

Correct Answer : T

QuestionID  :  11427         Subject Name  Linux

Q18. You can execute shell script onces it has be typed

Correct Answer : F

QuestionID  :  11433         Subject Name  Linux

Q19. To create files of large size in UNIX file System it is preferable to have blocks of large size

Correct Answer : T

QuestionID  :  11447         Subject Name  Linux

Q20. AABBCC is a valid password

Correct Answer : F

QuestionID  :  11452         Subject Name  Linux

Q21. To change our existing password we can execute the file /etc/passwd

Correct Answer : F

QuestionID  :  11453         Subject Name  Linux

Q22. Every legal user has to have a login id and a password

Correct Answer : T

QuestionID  :  11461         Subject Name  Linux

Q23. Any Shell script by default get executed in the current shell

Correct Answer : F

QuestionID  :  11466         Subject Name  Linux

Q24. echo statements output can be redirected to file

Correct Answer : F

QuestionID  :  11469         Subject Name  Linux

Q25. to search a pattern which starts with uni the command would be

1.  :/ < uni

2.  :/\ < uni

3.  : / \ < uni >

4.  none

Correct Answer : 2

QuestionID  :  11471         Subject Name  Linux

Q26. A shell variable can not handled negative value

Correct Answer : F

QuestionID  :  11474         Subject Name  Linux

Q27. to delete 5 lines from file & to copy them to buffer x we use "x5dd

Correct Answer : T

QuestionID  :  11482         Subject Name  Linux

Q28. The escape sequence \033[4m is used to

1.  underline character

2.  marked them as bold

3.  displayed them in reversed video

4.  None of the above

Correct Answer : 1

QuestionID  :  11485         Subject Name  Linux

Q29. The following command will give output: command: at 18:32 tommorow echo "Happy Birthday" output: After 15 minute form the time when the command is executed th screen will be cleared and a long listing of the current directory would ne dispalyed on the screen. ctr d

Correct Answer : T

QuestionID  :  11486         Subject Name  Linux

Q30. Only system adminstrator can cancel your printing job

Correct Answer : F

QuestionID  :  11500         Subject Name  Linux

Q31. Which of the following is not true as regards the kill command. 1)Superuser can kill daemon processes. 2)For sure kill the signal no is 9. 3)There is no surety that the shell process will get killed by the command kill < PID of shell process > 4)Using kill command you can kill other user`s processes too.

1.  1,2

2.  2,3

3.  1,4

4.  All

Correct Answer : 3

QuestionID  :  11507         Subject Name  Linux

Q32. Which of the following is not true. 1)The at command permits you to receive messages only by mail. 2)A person`s login name appears in the file at.allow if he is not allowed use the at command.

1.  1

2.  2

3.  Both are false

4.  Both are true.

Correct Answer : 3

QuestionID  :  11511         Subject Name  Linux

Q33. The command cat < file1 > file2 will copy the contents of file1 to file2

Correct Answer : T

QuestionID  :  11513         Subject Name  Linux

Q34. The shell meta character $# represents

1.  total number of arguments supplied to the shell script

2.  total number of files in the current directory

3.  total number of users who have logged in

4.  total number of process running in the background

Correct Answer : 1

QuestionID  :  11516         Subject Name  Linux

Q35. The command that Unix offers to a user to find out whether he can send messages to a particular terminal are

1.  finger and who

2.  finger -mesg and who -T

3.  finger -i and who -t

4.  finger -i and who -T

Correct Answer : 2

QuestionID  :  11519         Subject Name  Linux

Q36. The command wc -l < aaa displays the no of words present in the file aaa.

Correct Answer : F

QuestionID  :  11535         Subject Name  Linux

Q37. Using a tar we can archive files only on magnetic tape

Correct Answer : F

QuestionID  :  11543         Subject Name  Linux

Q38. Command to Merge the content of file f1 with the inputs supplied from the keyboard and store the output in a file f2

1.  sort -m f1 - > f2

2.  sort -m f1 f2

3.  merge -m f1 f2

4.  none

Correct Answer : 1

QuestionID  :  11549         Subject Name  Linux

Q39. Unix commands which accept the input from standard input device and send the output to the standard output device are called "filters".

Correct Answer : T

QuestionID  :  11559         Subject Name  Linux

Q40. k=35 echo `[$k -eq 35 ] ``[$k-eq 50]`

1.  blank line

2.  dotted line

3.  error

4.  none

Correct Answer : 1

QuestionID  :  11570         Subject Name  Linux

Q41. Command for search all lines in a file which do not ends with a semicolon

1.  grep -v ";" filename

2.  grep -v ";$" filename

3.  grep ";$" filename

4.  grep -x ";$" filename

Correct Answer : 2

QuestionID  :  11573         Subject Name  Linux

Q42. x=10 if[x -ge 2] //Is the comparision correct ?

Correct Answer : F

QuestionID  :  11576         Subject Name  Linux

Q43. x=3 y=3.5 if [$x -eq $y ] then Echo x and y are equal else Echo x and y are not equal

1.  Echo x and y are equal

2.  Echo x and y are not equal

3.  error

4.  none

Correct Answer : 1

QuestionID  :  11581         Subject Name  Linux

Q44. The command ls -l >> f1 would overwrite the contents of f1 with the output of the command ls -l.

Correct Answer : F

QuestionID  :  11584         Subject Name  Linux

Q45. the if-then-fi instruction are decision control instruction

Correct Answer : T

QuestionID  :  11594         Subject Name  Linux

Q46. which of the following are not unix commnads?

1.  md

2.  rd

3.  both 1 & 2

4.  cd

Correct Answer : 3

QuestionID  :  11597         Subject Name  Linux

Q47. You have already logged in and some body sends mail to you. In such an event when you whould receive the message `you have mail`?

1.  By setting the variable MAILNOTIFY

2.  By setting the variable MAILCHECK

3.  By setting the variable MAILREAD

4.  None

Correct Answer : 2

QuestionID  :  11607         Subject Name  Linux

Q48. how will you find out which process have been launched from a specific terminal ?

1.  ps -t ttynumber

2.  ps

3.  ps -t

4.  none

Correct Answer : 1

QuestionID  :  11612         Subject Name  Linux

Q49. point out error 1. Echo Enter filename 2. read fname 3. if[-rwx $fname] 3. then 4. echo read write and execute permissions 5. fi

1.  line 3

2.  line 1

3.  line 5

4.  no error

Correct Answer : 1

QuestionID  :  11613         Subject Name  Linux

Q50. In scheduling using "batch" command the system decides the best time for executing our command.Moreover the time at which our command will be executed is not in our control.

Correct Answer : T

QuestionID  :  11056         Subject Name  Operating Syatems Concepts

Q1. The cpu utilization is low when the system is

1.  executing

2.  thrasing

3.  waiting

4.  all of the above

Correct Answer : 2

QuestionID  :  11065         Subject Name  Operating Syatems Concepts

Q2. A programm can execute more than once simultaneously is called

1.  re-executable

2.  re-entrant

3.  multiprogramming

4.  none of the above

Correct Answer : 2

QuestionID  :  11068         Subject Name  Operating Syatems Concepts

Q3. All the entries in FAT corresponds to clusters

Correct Answer : T

QuestionID  :  11071         Subject Name  Operating Syatems Concepts

Q4. ------ scheduler selects the process that is ready to execute to CPU.

1.  long-term scheduler

2.  short-term scheduler

3.  medium-term scheduler

4.  None of these

Correct Answer : 2

QuestionID  :  11074         Subject Name  Operating Syatems Concepts

Q5. LAN covers radius of up to 10 KM

Correct Answer : F

QuestionID  :  11089         Subject Name  Operating Syatems Concepts

Q6. Semaphores are used to solve the problem of

1.  Race condition

2.  process syncronisation

3.  mutual exclusion

4.  both b&c

Correct Answer : 4

QuestionID  :  11094         Subject Name  Operating Syatems Concepts

Q7. SPOOLING stands for _________

1.  Simultaneous Peripheral Operations OnLine

2.  Spontaneous Peripheral Operations OnLine

3.  Serial Peripheral Operations OnLine

4.  None of the above

Correct Answer : 1

QuestionID  :  11097         Subject Name  Operating Syatems Concepts

Q8. Which of the following is true? a) the linkage editor is used to edit programs which have to be later linked together b) the linkage editor links object modules during compiling or assembling c) the linkage editor links object modules and resolves external references between them before loading d) the linkage editor resolves external references between the object modules during execution time

1.  only c

2.  a and c

3.  only b

4.  all of the above

Correct Answer : 1

QuestionID  :  11099         Subject Name  Operating Syatems Concepts

Q9. With a single resource deadlock occures

1.  if there are more than two processes computing for that resource

2.  if there are only than two processes computing for that resource

3.  if there are a single process computing for that resource

4.  None of the above

Correct Answer : 4

QuestionID  :  11105         Subject Name  Operating Syatems Concepts

Q10. It is possible to have a deadlock involving only a single process

Correct Answer : F

QuestionID  :  11107         Subject Name  Operating Syatems Concepts

Q11. _____________ is a significant factor in maintaining fragmentation within usable limits

1.  External Fragmentation

2.  Paging

3.  Coalescing of holes

4.  Both 2 and 3

Correct Answer : 4

QuestionID  :  11108         Subject Name  Operating Syatems Concepts

Q12. Pre-emptive scheduling is the strategy of temporarily suspending a running process

1.  before the cpu time slice expires

2.  to allow starving process to run

3.  when it request i/o

4.  none of the above

Correct Answer : 1

QuestionID  :  11112         Subject Name  Operating Syatems Concepts

Q13. When fork() is given-

1.  it creates a child process

2.  allocates slot in process table

3.  returns 0 to parent & ID to child

4.  All of the above.

Correct Answer : 1

QuestionID  :  11125         Subject Name  Operating Syatems Concepts

Q14. ________ is an example of sharable resource and __________ is an example of non Sharable resouece.

1.  Memory,Terminal.

2.  Mouse,KeyBoard

3.  Monitor,CPU

4.  None of above.

Correct Answer : 1

QuestionID  :  11137         Subject Name  Operating Syatems Concepts

Q15. When fork() is given-

1.  it creates a child process.

2.  Allocates slot in process table.

3.  returns 0 to parent and ID to child.

4.  all of the above.

Correct Answer : 4

QuestionID  :  11138         Subject Name  Operating Syatems Concepts

Q16. Which of the following cpu schedulling algorithms will prevented stravation?

1.  shortest-job-first

2.  priority schedulling algorithm

3.  priority schedulling will againg mechanism

4.  none

Correct Answer : 3

QuestionID  :  11141         Subject Name  Operating Syatems Concepts

Q17. Which of the following statement is true?

1.  A computer Virus is complete program that makes active attacks.

2.  A computer virus is program segment that makes passive attatcks.

3.  A logic bomb is program segment that makes passive attacks.

4.  A logic bomb is program that makes active attacks.

Correct Answer : 1

QuestionID  :  11144         Subject Name  Operating Syatems Concepts

Q18. The time of admission of job to ready queue to completion is_______

1.  Turnaround time

2.  Burst time

3.  Response time

4.  None of the above.

Correct Answer : 1

QuestionID  :  11149         Subject Name  Operating Syatems Concepts

Q19. The fastest strogage element is?

1.  CDRAM

2.  DRAM

3.  EDO-DRAM

4.  SDRAM

Correct Answer : 2

QuestionID  :  11151         Subject Name  Operating Syatems Concepts

Q20. Which of the following CPU scheduling algorithm will prevent starvation problem.

1.  shortest-job-first

2.  priority scheduling

3.  priority scheduling with aging mechanism

4.  None of the above

Correct Answer : 3

QuestionID  :  11152         Subject Name  Operating Syatems Concepts

Q21. Kernel is

1.  considered as critical part of operating system.

2.  software which monitors operating system.

3.  set of primitive functions upon which rest of operating system functions are built up.

4.  none of the above.

Correct Answer : 3

QuestionID  :  11157         Subject Name  Operating Syatems Concepts

Q22. At a perticular time of computation the value of counting semaphore is 7. Then 20 `p` operation abd x `v` operation were completed on this semaphore. If the final value of the semaphore is 5, x will be...

1.  15

2.  22

3.  18

4.  13

Correct Answer : 3

QuestionID  :  11170         Subject Name  Operating Syatems Concepts

Q23. The process of loading the os into the main memory is done by the bootstrap loader.

Correct Answer : T

QuestionID  :  11193         Subject Name  Operating Syatems Concepts

Q24. A___________ operating system is an operating syatem which requires a timely response from a computer system

1.  Batch os

2.  Workstation

3.  a and b

4.  None of the above

Correct Answer : 4

QuestionID  :  11194         Subject Name  Operating Syatems Concepts

Q25. following is a path under execution

1.  directory

2.  file

3.  thread

4.  all

Correct Answer : 3

QuestionID  :  11202         Subject Name  Operating Syatems Concepts

Q26. Supervisor call

1.  is call made by supervisor of the system

2.  is a call with control functions

3.  are previlaged calls that are used to perform resource management functions which are controlled by operating system.

4.  is a call made by someone working in root directory.

Correct Answer : 3

QuestionID  :  11217         Subject Name  Operating Syatems Concepts

Q27. Which of the following page replacement algorithms suffers from Belady`s anomaly?

1.  Optimal replacement

2.  LRU

3.  FIFO

4.  Both optimal replacement and FIFO

Correct Answer : 3

QuestionID  :  11227         Subject Name  Operating Syatems Concepts

Q28. DOS is an example of ...... user system

1.  Multiuser system

2.  Single user system

3.  both 1 and 2

4.  none of the above

Correct Answer : 2

QuestionID  :  11246         Subject Name  Operating Syatems Concepts

Q29. Blocking primitives are also called as synchronous communication

Correct Answer : T

QuestionID  :  11248         Subject Name  Operating Syatems Concepts

Q30. which of the following is page replacement algorithim

1.  FIFO Page replacement

2.  LRU

3.   optimal page replacement

4.  all

Correct Answer : 4

QuestionID  :  11250         Subject Name  Operating Syatems Concepts

Q31. single system image is obtained in case of Distributed system

Correct Answer : T

QuestionID  :  11251         Subject Name  Operating Syatems Concepts

Q32. Unix is a Multiuser,Multitasking,Multiprocessing Operating system.

Correct Answer : T

QuestionID  :  11252         Subject Name  Operating Syatems Concepts

Q33. Device Controller is a Hardware

Correct Answer : F

QuestionID  :  11255         Subject Name  Operating Syatems Concepts

Q34. Consider a system having m resources of same type.The resources are shared by 3 processes A,B ,C which have peak time demands of 3,4,6 respctively.The minimum value of m that ensures that deadlock will never occur is

1.  11

2.  12

3.  13

4.  14

Correct Answer : 1

QuestionID  :  11256         Subject Name  Operating Syatems Concepts

Q35. The context of a process is the union of its

1.  region table,uarea,system level context & user level context

2.  register context,pregion table,user level context

3.  System level context,register context,user level context

4.  process table,user level context,register context

Correct Answer : 1

QuestionID  :  11268         Subject Name  Operating Syatems Concepts

Q36. m processes share n resources of the same type .The maximum need of each process does not exceed n and the sum of all their maximum needs is always less than m+n.In this set up deadlock --------.

1.  can never occur

2.  may occur

3.  has to occur

4.  none of the above

Correct Answer : 1

QuestionID  :  11270         Subject Name  Operating Syatems Concepts

Q37. Within `` piping and redirection metacharacters cannot be used.

Correct Answer : F

QuestionID  :  11271         Subject Name  Operating Syatems Concepts

Q38. Unix is the example of the Distributed operating system

Correct Answer : T

QuestionID  :  11272         Subject Name  Operating Syatems Concepts

Q39. which of the following is false

1.  deadlock state is unsafe

2.  unsafe state may lead to deadlock situation

3.  unsafe state must lead to deadlock situation

4.  deadlock system is subset of unsafe system

Correct Answer : 3

QuestionID  :  11275         Subject Name  Operating Syatems Concepts

Q40. a demand paging system with page table held in registers takes 5 milli sec to service a page fault, if an empty page is available, or if page to be replaced is not dirty. It takes 50 milli sec if the replaced page is dirty. memory access time is 1 micro sec, assume we want an effective access time of 2 micro sec and that page to be replaced is dirty 60% of time, what is the approximate maximum acceptible page fault rate to meet this access time requirement

1.  0.1%

2.  1.0%

3.  2.5%

4.  0.01%

Correct Answer : 4

QuestionID  :  11282         Subject Name  Operating Syatems Concepts

Q41. Round Robin algorithm is an example timesharing scheduling policy.

Correct Answer : T

QuestionID  :  11285         Subject Name  Operating Syatems Concepts

Q42. Locality of reference implies that the page reference being made by a process

1.  will always be to the page used in previous page refernce

2.  is likely to be one of the pages used in the last few page references

3.  will always be one of the pages existing in memory

4.  will always lead to a page fault

Correct Answer : 2

QuestionID  :  11287         Subject Name  Operating Syatems Concepts

Q43. Th e correct matching of the following pairs : A. disk sccheduling 1.round robin B. batch processing 2.scan C. time sharing 3. LIFO D. interrupt processing 4.FIFO

1.  A-3,B-4,C-2,D-1

2.  A-4,B-3,C-2,D-1

3.  A-2,B-4,C-1,D-3

4.  A-2,B-1,C-4,D-3

Correct Answer : 3

QuestionID  :  11290         Subject Name  Operating Syatems Concepts

Q44. Mutex is an acronym for Mutual Exclusion.

Correct Answer : T

QuestionID  :  11302         Subject Name  Operating Syatems Concepts

Q45. Main advantage of EISA bus over micro channel bus was:

1.  it offered more bandwidth over micro channel

2.  it had software configurable devices

3.  it was backward compatible with ISA

4.  it made the existing peripherals run faster

Correct Answer : 2

QuestionID  :  11306         Subject Name  Operating Syatems Concepts

Q46. Multiprograming degenrates to time sharing system if there is no proper mix of CPU and i/o bound jobs

Correct Answer : F

QuestionID  :  11309         Subject Name  Operating Syatems Concepts

Q47. Single system image is obtained in case of ----

1.  desktop

2.  Distributed

3.  network

4.  none

Correct Answer : 2

QuestionID  :  11310         Subject Name  Operating Syatems Concepts

Q48. Circuit switching has two variants -connection oriented and connectionless

Correct Answer : F

QuestionID  :  11311         Subject Name  Operating Syatems Concepts

Q49. 80826 the addressing schema is __________ addressing

1.  8 bit

2.  16 bit

3.  24 bit

4.  28 bit

Correct Answer : 3

QuestionID  :  11624         Subject Name  Operating Syatems Concepts

Q50. Unix is a network operating system

Correct Answer : T

Top of Form

QuestionID  :  11063         Subject Name  Operating Syatems Concepts

Q1. Tape is magnetic device.

Correct Answer : T

QuestionID  :  11070         Subject Name  Operating Syatems Concepts

Q2. During the process of loading the program, a __________ modifies the actual instruction so that the effect of load address is taken into account

1.  resource locator

2.  loader

3.  relocating loader

4.  relocation register

Correct Answer : 4

QuestionID  :  11072         Subject Name  Operating Syatems Concepts

Q3. Relocation and address translation can be achieved with the help of paging

Correct Answer : T

QuestionID  :  11074         Subject Name  Operating Syatems Concepts

Q4. LAN covers radius of up to 10 KM

Correct Answer : F

QuestionID  :  11078         Subject Name  Operating Syatems Concepts

Q5. time sharing system uses round robin scheduling algorithmn.

Correct Answer : T

QuestionID  :  11084         Subject Name  Operating Syatems Concepts

Q6. If the scheduling policy is FCFS the average waiting time will be?

1.  12.8 ms

2.  8 ms

3.  16 ms

4.  none of the above

Correct Answer : 1

QuestionID  :  11090         Subject Name  Operating Syatems Concepts

Q7. Spatial locality refers to the problem that once a location is referenced

1.  it will not be referenced again.

2.  it will be referenced again.

3.  A nearby location will be referenced soon.

4.  none of the above.

Correct Answer : 3

QuestionID  :  11099         Subject Name  Operating Syatems Concepts

Q8. With a single resource deadlock occures

1.  if there are more than two processes computing for that resource

2.  if there are only than two processes computing for that resource

3.  if there are a single process computing for that resource

4.  None of the above

Correct Answer : 4

QuestionID  :  11106         Subject Name  Operating Syatems Concepts

Q9. NRU stands for NOT RECENTLY USED & LRU stands for LEAST RECENTLY USED

Correct Answer : T

QuestionID  :  11109         Subject Name  Operating Syatems Concepts

Q10. The following is a part of FAT.

1.  Sector info.

2.  Disk type

3.  Modified info.

4.  Date info.

Correct Answer : 1

QuestionID  :  11111         Subject Name  Operating Syatems Concepts

Q11. Time elapsed for position of Read / Write head under the desired sector is called?

1.  Seek Time

2.  Latency Time

3.  Turnaround Time

4.  None of above

Correct Answer : 2

QuestionID  :  11115         Subject Name  Operating Syatems Concepts

Q12. the address sequence generated by a particular program executing in demand paging with 100 records per page with one free memory frame is recorded.what is the number of page fault; 100,200,430,499,510,530,560,120,220,240,260,320,370

1.  13

2.  7

3.  8

4.  10

Correct Answer : 4

QuestionID  :  11125         Subject Name  Operating Syatems Concepts

Q13. ________ is an example of sharable resource and __________ is an example of non Sharable resouece.

1.  Memory,Terminal.

2.  Mouse,KeyBoard

3.  Monitor,CPU

4.  None of above.

Correct Answer : 1

QuestionID  :  11126         Subject Name  Operating Syatems Concepts

Q14. Round-Robbin understands priority?

Correct Answer : F

QuestionID  :  11132         Subject Name  Operating Syatems Concepts

Q15. Critical region is

1.  a part of operating system which is not allowed to be accessed by any process.

2.  a set of instructions that access common shared resource which exclude one another in time.

3.  the portion of main memory which can be accessed only by one process at a time.

4.  None of the above.

Correct Answer : 2

QuestionID  :  11133         Subject Name  Operating Syatems Concepts

Q16. Pipe is the mechanism whereby the output of one process is directed into input of another process

Correct Answer : T

QuestionID  :  11136         Subject Name  Operating Syatems Concepts

Q17. Efficient operation of computer system and Convinience for user are the goals of operating system.

Correct Answer : T

QuestionID  :  11138         Subject Name  Operating Syatems Concepts

Q18. Which of the following cpu schedulling algorithms will prevented stravation?

1.  shortest-job-first

2.  priority schedulling algorithm

3.  priority schedulling will againg mechanism

4.  none

Correct Answer : 3

QuestionID  :  11140         Subject Name  Operating Syatems Concepts

Q19. The first-fit,best-fit,worst-fit algorithm can be used for

1.  Contiguous memory allocation

2.  Linked memory allocation

3.  Indexed memory allocation

4.  All of the above

Correct Answer : 1

QuestionID  :  11141         Subject Name  Operating Syatems Concepts

Q20. Which of the following statement is true?

1.  A computer Virus is complete program that makes active attacks.

2.  A computer virus is program segment that makes passive attatcks.

3.  A logic bomb is program segment that makes passive attacks.

4.  A logic bomb is program that makes active attacks.

Correct Answer : 1

QuestionID  :  11145         Subject Name  Operating Syatems Concepts

Q21. A file system uses the contiguous space allocation mechanism for disk allocation .For better utilization of disk space ,this file system must use

1.  A garbage collection mechanism

2.  A disk compaction mechanism

3.  A linked-block allocation mechanism

4.  An indexed-block allocation mechanism

Correct Answer : 4

QuestionID  :  11150         Subject Name  Operating Syatems Concepts

Q22. If the C.P.U. scheduling Policy is priority scheduing without the pre-emption the average waiting time will be_________

1.  12.8 ms

2.  11.8 ms

3.  10.8 ms

4.  none of the above

Correct Answer : 3

QuestionID  :  11153         Subject Name  Operating Syatems Concepts

Q23. A purpose of virtual memory system is to

1.  Allow multiprocessing

2.  Allow multiprogramming

3.  Allow batch processing

4.  Allow execution of program that larger memory than the size of the physical main memory.

Correct Answer : 4

QuestionID  :  11157         Subject Name  Operating Syatems Concepts

Q24. At a perticular time of computation the value of counting semaphore is 7. Then 20 `p` operation abd x `v` operation were completed on this semaphore. If the final value of the semaphore is 5, x will be...

1.  15

2.  22

3.  18

4.  13

Correct Answer : 3

QuestionID  :  11160         Subject Name  Operating Syatems Concepts

Q25. An OS is the interface between Hardware and user.

Correct Answer : T

QuestionID  :  11161         Subject Name  Operating Syatems Concepts

Q26. The main purpose(s)of an operating system is/are________

1.  Convenience for the user.

2.  Efficient operation of the Computer system.

3.  Optimal use of Computer resources.

4.  All of the above

Correct Answer : 4

QuestionID  :  11167         Subject Name  Operating Syatems Concepts

Q27. In the context of concurrent processes ,____________ is used to control the access to shared the data

1.  semaphore

2.  deadlock

3.  monitor

4.  ALU

Correct Answer : 1

QuestionID  :  11171         Subject Name  Operating Syatems Concepts

Q28. Memory protection is of no use in a ...

1.  single user system

2.  non-multiprogramming system

3.  non-multitasking system

4.  none of above

Correct Answer : 4

QuestionID  :  11183         Subject Name  Operating Syatems Concepts

Q29. Cascading Termination refers to termination of all child processes before parent terminates

1.  normally

2.  abnormally

3.  normally and abnormally

4.  none of above

Correct Answer : 4

QuestionID  :  11186         Subject Name  Operating Syatems Concepts

Q30. The size of virtual memory depends on the size of the

1.  data bus

2.  main memory

3.  address bus

4.  none

Correct Answer : 3

QuestionID  :  11187         Subject Name  Operating Syatems Concepts

Q31. `Aging` is

1.  keeping track of cache contents

2.  keeping track of what pages are currently residing in the memory

3.  keeping track how many times the given page is refrenced

4.  increasing the priority of jobs to ensure termination in a finite time

Correct Answer : 4

QuestionID  :  11190         Subject Name  Operating Syatems Concepts

Q32. Which of the following CPU scheduling algorithms will prevent starvation problem?

1.  shortest job first

2.  priority scheduling

3.  priority scheduling with aging mechanism

4.  none of the above

Correct Answer : 3

QuestionID  :  11197         Subject Name  Operating Syatems Concepts

Q33. If property of locality of reference is well pronounced in a program

1.  number of page faults will be more.

2.  number of page faults will be less and execution will be faster.

3.  number of page faults will remain same.

4.  none of the above.

Correct Answer : 2

QuestionID  :  11199         Subject Name  Operating Syatems Concepts

Q34. Which of the following is not a part of a process control block(PCB).

1.  Values of a CPU registers

2.  CPU Scheduling information

3.  Memory limits of the process

4.  List of files accessible to the proces.

Correct Answer : 4

QuestionID  :  11201         Subject Name  Operating Syatems Concepts

Q35. Following is not a IPC

1.  semaphore

2.  pipe

3.  shared memory

4.  Buffering

Correct Answer : 1

QuestionID  :  11218         Subject Name  Operating Syatems Concepts

Q36. In partitioned memory allocation scheme the ________

1.  Best fit Algorithm is always better then the first fit algorithm.

2.  First fit Algorithm is always better then the Best fit algorithm.

3.  Superiority of the first fit & best fit depends on the sequence of memory request .

4.  none of the above.

Correct Answer : 3

QuestionID  :  11223         Subject Name  Operating Syatems Concepts

Q37. If there are 32 segments ,each of size 1 kbytes,then the logical address should have-----.

1.  13 bits

2.  14 bits

3.  15 bits

4.  16 bits

Correct Answer : 3

QuestionID  :  11224         Subject Name  Operating Syatems Concepts

Q38. Which of the following are RTOS ?

1.  An on-line railway reservation system

2.  A process control system.

3.  Aircraft control system.

4.  Payroll processing system.

Correct Answer : 3

QuestionID  :  11235         Subject Name  Operating Syatems Concepts

Q39. The Motivations Behind Networks are 1)Resource Sharing 2)Computation Speedup 3)Reliability 4)Communication

1.  1,2

2.  1,3

3.  only 3

4.  All the Above

Correct Answer : 4

QuestionID  :  11244         Subject Name  Operating Syatems Concepts

Q40. Round Robin is an example of timesharing scheduling policy.

Correct Answer : T

QuestionID  :  11261         Subject Name  Operating Syatems Concepts

Q41. In a paged memory the page hit ratio is 0.35.The time required to access a page in secondary memory is equal to 100ns. the time required to access a page in primary memory is 10ns.The average time required to access a page is

1.  3.0ns

2.  68.0ns

3.  68.5ns

4.  78.5ns

Correct Answer : 3

QuestionID  :  11264         Subject Name  Operating Syatems Concepts

Q42. The problem of Thrashing may be reduced by ______________

1.  using prepaging mechanism

2.  writing well structured programs

3.  both 1 & 2

4.  neither 1 & 2

Correct Answer : 3

QuestionID  :  11266         Subject Name  Operating Syatems Concepts

Q43. The problem of thrashing may be reduced by

1.  Using prepaging mechanism

2.  writing well structured program.

3.  Both 1 & 2

4.  Neither 1 & 2

Correct Answer : 3

QuestionID  :  11272         Subject Name  Operating Syatems Concepts

Q44. which of the following is false

1.  deadlock state is unsafe

2.  unsafe state may lead to deadlock situation

3.  unsafe state must lead to deadlock situation

4.  deadlock system is subset of unsafe system

Correct Answer : 3

QuestionID  :  11274         Subject Name  Operating Syatems Concepts

Q45. If filenames are supplied as arguments to a script rm"$@" would remove all files supplied as arguments.

Correct Answer : T

QuestionID  :  11277         Subject Name  Operating Syatems Concepts

Q46. Which of the Following operating Systems are not available for non-intel platforms

1.  Windows NT

2.  Solaris

3.  Linux

4.  All of the above

Correct Answer : 2

QuestionID  :  11284         Subject Name  Operating Syatems Concepts

Q47. The interval from the time of submission of a process to the time of completion is

1.  Turnaround time

2.  waiting time

3.  response time

4.  none of these

Correct Answer : 1

QuestionID  :  11285         Subject Name  Operating Syatems Concepts

Q48. Locality of reference implies that the page reference being made by a process

1.  will always be to the page used in previous page refernce

2.  is likely to be one of the pages used in the last few page references

3.  will always be one of the pages existing in memory

4.  will always lead to a page fault

Correct Answer : 2

QuestionID  :  11309         Subject Name  Operating Syatems Concepts

Q49. Single system image is obtained in case of ----

1.  desktop

2.  Distributed

3.  network

4.  none

Correct Answer : 2

QuestionID  :  11310         Subject Name  Operating Syatems Concepts

Q50. Circuit switching has two variants -connection oriented and connectionless

Correct Answer : F

Top of Form

QuestionID  :  11059         Subject Name  Operating Syatems Concepts

Q1. The CPU utilization is low when the system is

1.  Time sharing

2.  Thrashing

3.  Multiprocessing

4.  None of the above

Correct Answer : 2

QuestionID  :  11071         Subject Name  Operating Syatems Concepts

Q2. ------ scheduler selects the process that is ready to execute to CPU.

1.  long-term scheduler

2.  short-term scheduler

3.  medium-term scheduler

4.  None of these

Correct Answer : 2

QuestionID  :  11074         Subject Name  Operating Syatems Concepts

Q3. LAN covers radius of up to 10 KM

Correct Answer : F

QuestionID  :  11083         Subject Name  Operating Syatems Concepts

Q4. A process refers to 5 pages, A,B,C,D & E in the order - A; B; C; D; A; B; E; A; B; C; D; E. If the page replacement algorithm is FIFO,the number of pages which transfer with an emty internal store of 3 frames is

1.  8

2.  10

3.  9

4.  7

Correct Answer : 3

QuestionID  :  11088         Subject Name  Operating Syatems Concepts

Q5. Disk request come to a disk driver for cylinders in the order 10,22,20,2,40,6 and 38, at time when the disk drive is reading from cylinder 20. The seek time is 6 ms per cylinder. the total seek time, if the disk arm sheduling algorithm is first come first served is

1.  360 ms

2.  850 ms

3.  900 ms

4.  none of above

Correct Answer : 4

QuestionID  :  11093         Subject Name  Operating Syatems Concepts

Q6. SPOOLING stands for simultaneous peripheral operation online.

Correct Answer : T

QuestionID  :  11101         Subject Name  Operating Syatems Concepts

Q7. The following is not a form of IPC.

1.  semaphore

2.  pipe

3.  shared memory

4.  buffering

Correct Answer : 1

QuestionID  :  11102         Subject Name  Operating Syatems Concepts

Q8. Disk request come to a disk driver for cylinders in the order 10,22,20,2,40,6 and 38, at time when the disk drive is reading from cylinder 20. The seek time is 6 ms per cylinder. the total seek time, if the disk arm sheduling algorithm is closest cylinder next is

1.  360 ms

2.  876 ms

3.  850 ms

4.  900 ms

Correct Answer : 1

QuestionID  :  11105         Subject Name  Operating Syatems Concepts

Q9. It is possible to have a deadlock involving only a single process

Correct Answer : F

QuestionID  :  11110         Subject Name  Operating Syatems Concepts

Q10. The signal the keyboard sends to the computer is special kind of message called__________

1.  Keyboard request

2.  Keyboard controller

3.  Interrupt Controller

4.  Interrupt Request

Correct Answer : 4

QuestionID  :  11115         Subject Name  Operating Syatems Concepts

Q11. the address sequence generated by a particular program executing in demand paging with 100 records per page with one free memory frame is recorded.what is the number of page fault; 100,200,430,499,510,530,560,120,220,240,260,320,370

1.  13

2.  7

3.  8

4.  10

Correct Answer : 4

QuestionID  :  11118         Subject Name  Operating Syatems Concepts

Q12. Protection of memory is ensured using ------- and -------.

1.  paging,virtual memory

2.  base register ,limit register

3.  IP egister,hardware register

4.  scheduling,synchronization

Correct Answer : 2

QuestionID  :  11119         Subject Name  Operating Syatems Concepts

Q13. Which of the following is true? a) Overlays are used to increase the size of physical memory b) Overlays are used to increase the logical address space c) when overlays are used the size of project is not limited to the size of physical memory d) Overlays are used whenever the physical address space is smaller than the logical address space

1.  a and b

2.  only c

3.  only a

4.  none of the above

Correct Answer : 2

QuestionID  :  11122         Subject Name  Operating Syatems Concepts

Q14. Banker`s algorithm is an example of Deadlock avoidance.

Correct Answer : T

QuestionID  :  11125         Subject Name  Operating Syatems Concepts

Q15. ________ is an example of sharable resource and __________ is an example of non Sharable resouece.

1.  Memory,Terminal.

2.  Mouse,KeyBoard

3.  Monitor,CPU

4.  None of above.

Correct Answer : 1

QuestionID  :  11141         Subject Name  Operating Syatems Concepts

Q16. Which of the following statement is true?

1.  A computer Virus is complete program that makes active attacks.

2.  A computer virus is program segment that makes passive attatcks.

3.  A logic bomb is program segment that makes passive attacks.

4.  A logic bomb is program that makes active attacks.

Correct Answer : 1

QuestionID  :  11148         Subject Name  Operating Syatems Concepts

Q17. Which of the following is the most suitable scheduling scheme in real time operating system.

1.  round robin

2.  first come first served

3.  pre-emtive scheduling

4.  random scheduling

Correct Answer : 3

QuestionID  :  11165         Subject Name  Operating Syatems Concepts

Q18. Bankers algorithm is an example of deadlock avoidance.

Correct Answer : T

QuestionID  :  11167         Subject Name  Operating Syatems Concepts

Q19. In the context of concurrent processes ,____________ is used to control the access to shared the data

1.  semaphore

2.  deadlock

3.  monitor

4.  ALU

Correct Answer : 1

QuestionID  :  11168         Subject Name  Operating Syatems Concepts

Q20. Which of the following are single user Operating Systems.

1.  MS-DOS Only

2.  Unix

3.  MS-DOS,Xenix

4.  OS/2.

Correct Answer : 3

QuestionID  :  11172         Subject Name  Operating Syatems Concepts

Q21. Andrew and Sprite are examples of Distributed operating system.

Correct Answer : T

QuestionID  :  11180         Subject Name  Operating Syatems Concepts

Q22. During system stratup,program execution begin at address FFFOH

Correct Answer : T

QuestionID  :  11182         Subject Name  Operating Syatems Concepts

Q23. In Round robin CPU scheduling as the time quantum is incresed the average turn around time ....

1.  Increases

2.  Decreases

3.  Varies

4.  Varies irregularly.

Correct Answer : 4

QuestionID  :  11186         Subject Name  Operating Syatems Concepts

Q24. The size of virtual memory depends on the size of the

1.  data bus

2.  main memory

3.  address bus

4.  none

Correct Answer : 3

QuestionID  :  11189         Subject Name  Operating Syatems Concepts

Q25. In paged memory system if the page size is increased then internal fragmentation generally.

1.  becomes less

2.  becomes more

3.  remains constant

4.  none of the above

Correct Answer : 2

QuestionID  :  11193         Subject Name  Operating Syatems Concepts

Q26. A___________ operating system is an operating syatem which requires a timely response from a computer system

1.  Batch os

2.  Workstation

3.  a and b

4.  None of the above

Correct Answer : 4

QuestionID  :  11195         Subject Name  Operating Syatems Concepts

Q27. Suppose the architecture of a computer system is layered into the following four layers:-

1.  Operating System software.

2.  users application software.

3.  hardware and programming environment software.

4.  all of the above.

Correct Answer : 4

QuestionID  :  11201         Subject Name  Operating Syatems Concepts

Q28. Following is not a IPC

1.  semaphore

2.  pipe

3.  shared memory

4.  Buffering

Correct Answer : 1

QuestionID  :  11203         Subject Name  Operating Syatems Concepts

Q29. The protected mode is necessary for :-

1.  Multitasking system.

2.  Multiuser System.

3.  both 1 & 2

4.  16 bit programming.

Correct Answer : 1

QuestionID  :  11204         Subject Name  Operating Syatems Concepts

Q30. _________ sheduler select the process that is ready to execute to CPU.

1.  Long term

2.  Short term

3.  medium term

4.  none of above

Correct Answer : 2

QuestionID  :  11217         Subject Name  Operating Syatems Concepts

Q31. Which of the following page replacement algorithms suffers from Belady`s anomaly?

1.  Optimal replacement

2.  LRU

3.  FIFO

4.  Both optimal replacement and FIFO

Correct Answer : 3

QuestionID  :  11233         Subject Name  Operating Syatems Concepts

Q32. Which of the following statement is true for dead lock?

1.  The system can not run any process.

2.  The system can not run any process barring all those involved in the deadlock?

3.  A running process can not request any new response.

4.  All processes in the ready queue enter the wait.

Correct Answer : 1

QuestionID  :  11234         Subject Name  Operating Syatems Concepts

Q33. The time of admission of a job to ready queue to completion is ______ .

1.  turn-arround time

2.  burst time

3.  response time

4.  None of above

Correct Answer : 1

QuestionID  :  11245         Subject Name  Operating Syatems Concepts

Q34. The segmented memory is provided mainly

1.  for higher speeds

2.  to maintain compatibity with old processors

3.  for ease of application programming

4.  simple hardware

Correct Answer : 1

QuestionID  :  11249         Subject Name  Operating Syatems Concepts

Q35. Which of the following is not features of RISC architecture.

1.  A limited instruction set.

2.  A large number of registers.

3.  Virtual memory

4.  The large number of execution modes.

Correct Answer : 2

QuestionID  :  11250         Subject Name  Operating Syatems Concepts

Q36. single system image is obtained in case of Distributed system

Correct Answer : T

QuestionID  :  11251         Subject Name  Operating Syatems Concepts

Q37. Unix is a Multiuser,Multitasking,Multiprocessing Operating system.

Correct Answer : T

QuestionID  :  11252         Subject Name  Operating Syatems Concepts

Q38. Device Controller is a Hardware

Correct Answer : F

QuestionID  :  11262         Subject Name  Operating Syatems Concepts

Q39. Which schedular selects the process that is ready toexecute to CPU.

1.  long term schedular

2.  mid-term schedular

3.  short-term schedular

4.  any schedular does not do that task

Correct Answer : 3

QuestionID  :  11272         Subject Name  Operating Syatems Concepts

Q40. which of the following is false

1.  deadlock state is unsafe

2.  unsafe state may lead to deadlock situation

3.  unsafe state must lead to deadlock situation

4.  deadlock system is subset of unsafe system

Correct Answer : 3

QuestionID  :  11275         Subject Name  Operating Syatems Concepts

Q41. a demand paging system with page table held in registers takes 5 milli sec to service a page fault, if an empty page is available, or if page to be replaced is not dirty. It takes 50 milli sec if the replaced page is dirty. memory access time is 1 micro sec, assume we want an effective access time of 2 micro sec and that page to be replaced is dirty 60% of time, what is the approximate maximum acceptible page fault rate to meet this access time requirement

1.  0.1%

2.  1.0%

3.  2.5%

4.  0.01%

Correct Answer : 4

QuestionID  :  11284         Subject Name  Operating Syatems Concepts

Q42. The interval from the time of submission of a process to the time of completion is

1.  Turnaround time

2.  waiting time

3.  response time

4.  none of these

Correct Answer : 1

QuestionID  :  11285         Subject Name  Operating Syatems Concepts

Q43. Locality of reference implies that the page reference being made by a process

1.  will always be to the page used in previous page refernce

2.  is likely to be one of the pages used in the last few page references

3.  will always be one of the pages existing in memory

4.  will always lead to a page fault

Correct Answer : 2

QuestionID  :  11295         Subject Name  Operating Syatems Concepts

Q44. Suppose the following files are present in the current directory: ashish arctan dac.doc dim.dwg document fag fibonacci finder fog folder sam si.c tarun zenith zombie Which files would be listed by the following command? Is [!0-9][!asd]*

1.  Display all the files whose first character is other than a digit and the second character is other than `a`, `s` or `d`

2.  Display all the files whose first character is other than a digit and the second character is other than `a`, `s`

3.  Display all the files

4.  None of the above

Correct Answer : 1

QuestionID  :  11296         Subject Name  Operating Syatems Concepts

Q45. The signal the keyboard sends to the computer is a special kind of message called ______

1.  Keyboard request

2.  Keyboard controller

3.  Interrupt controller

4.  Interrupt request

Correct Answer : 4

QuestionID  :  11303         Subject Name  Operating Syatems Concepts

Q46. b= [-n $b] echo $ ? [-z $b] echo $?

1.  Will run fine

2.  test : argument expected

3.  error

4.  none

Correct Answer : 2

QuestionID  :  11308         Subject Name  Operating Syatems Concepts

Q47. A space allocated in units of fixed size is called block

Correct Answer : T

QuestionID  :  11310         Subject Name  Operating Syatems Concepts

Q48. Circuit switching has two variants -connection oriented and connectionless

Correct Answer : F

QuestionID  :  11623         Subject Name  Operating Syatems Concepts

Q49. It is possible to have a dead lock involving only a single process

Correct Answer : F

QuestionID  :  12261         Subject Name  Operating Syatems Concepts

Q50. The __________ decodes an instruction and generates an electrical signal

1.  Arithematic and logic unit

2.  Main Memory

3.  Bios

4.  Control Unit

Correct Answer : 4

Top of Form

QuestionID  :  11056         Subject Name  Operating Syatems Concepts

Q1. The cpu utilization is low when the system is

1.  executing

2.  thrasing

3.  waiting

4.  all of the above

Correct Answer : 2

0

QuestionID  :  11057         Subject Name  Operating Syatems Concepts

Q2. Which of the following is non preemtive O.S.?

1.  Unix

2.  Windows 95

3.  Windows NT

4.  None

Correct Answer : 2

QuestionID  :  11064         Subject Name  Operating Syatems Concepts

Q3. FAT stands for

1.  File Allocation Table

2.  File Access Table

3.  File Attribute Table

4.  None of the above

Correct Answer : 1

QuestionID  :  11065         Subject Name  Operating Syatems Concepts

Q4. A programm can execute more than once simultaneously is called

1.  re-executable

2.  re-entrant

3.  multiprogramming

4.  none of the above

Correct Answer : 2

QuestionID  :  11067         Subject Name  Operating Syatems Concepts

Q5. A virus is a type of worm

Correct Answer : F

QuestionID  :  11069         Subject Name  Operating Syatems Concepts

Q6. To obtain better memory utilization , dynamic loading is used. With dynamic loading , routine is not loaded until it is called for. For implementing dynamic loading

1.  special support from hardware is essential

2.  special support from OS is essential

3.  special support from both hardware and OS is essential

4.  user programss can implement dynamic loading without any special support form the OS or the hardware

Correct Answer : 4

QuestionID  :  11070         Subject Name  Operating Syatems Concepts

Q7. During the process of loading the program, a __________ modifies the actual instruction so that the effect of load address is taken into account

1.  resource locator

2.  loader

3.  relocating loader

4.  relocation register

Correct Answer : 4

QuestionID  :  11071         Subject Name  Operating Syatems Concepts

Q8. ------ scheduler selects the process that is ready to execute to CPU.

1.  long-term scheduler

2.  short-term scheduler

3.  medium-term scheduler

4.  None of these

Correct Answer : 2

QuestionID  :  11073         Subject Name  Operating Syatems Concepts

Q9. A thread is a light-weight process.

Correct Answer : T

QuestionID  :  11074         Subject Name  Operating Syatems Concepts

Q10. LAN covers radius of up to 10 KM

Correct Answer : F

QuestionID  :  11081         Subject Name  Operating Syatems Concepts

Q11. The transfer of process from memory to secondary storage is called

1.  Process loading

2.  swapping

3.  segmentation

4.  relocating

Correct Answer : 2

QuestionID  :  11082         Subject Name  Operating Syatems Concepts

Q12. paging allows protection

Correct Answer : F

QuestionID  :  11086         Subject Name  Operating Syatems Concepts

Q13. Page Fault occurs when

1.  the page is corrupted by application software

2.  the page is in main memory

3.  the page is not in main memory

4.  one tries to divide a number by 0

Correct Answer : 3

QuestionID  :  11087         Subject Name  Operating Syatems Concepts

Q14. FCFS stands for -----

1.  Fast Come First Serve.

2.  First Come First Serve.

3.  Both are true.

4.  Both are False.

Correct Answer : 2

QuestionID  :  11091         Subject Name  Operating Syatems Concepts

Q15. Mutex is Mutual Exclusion semaphore.

Correct Answer : T

QuestionID  :  11094         Subject Name  Operating Syatems Concepts

Q16. SPOOLING stands for _________

1.  Simultaneous Peripheral Operations OnLine

2.  Spontaneous Peripheral Operations OnLine

3.  Serial Peripheral Operations OnLine

4.  None of the above

Correct Answer : 1

QuestionID  :  11095         Subject Name  Operating Syatems Concepts

Q17. Page fault rate is a relation between number of page faults & number of the page frames allocated to the process.

Correct Answer : T

QuestionID  :  11096         Subject Name  Operating Syatems Concepts

Q18. Turnaround refers to delay between job submission and job completion

Correct Answer : T

QuestionID  :  11097         Subject Name  Operating Syatems Concepts

Q19. Which of the following is true? a) the linkage editor is used to edit programs which have to be later linked together b) the linkage editor links object modules during compiling or assembling c) the linkage editor links object modules and resolves external references between them before loading d) the linkage editor resolves external references between the object modules during execution time

1.  only c

2.  a and c

3.  only b

4.  all of the above

Correct Answer : 1

QuestionID  :  11099         Subject Name  Operating Syatems Concepts

Q20. With a single resource deadlock occures

1.  if there are more than two processes computing for that resource

2.  if there are only than two processes computing for that resource

3.  if there are a single process computing for that resource

4.  None of the above

Correct Answer : 4

QuestionID  :  11105         Subject Name  Operating Syatems Concepts

Q21. It is possible to have a deadlock involving only a single process

Correct Answer : F

QuestionID  :  11107         Subject Name  Operating Syatems Concepts

Q22. _____________ is a significant factor in maintaining fragmentation within usable limits

1.  External Fragmentation

2.  Paging

3.  Coalescing of holes

4.  Both 2 and 3

Correct Answer : 4

QuestionID  :  11108         Subject Name  Operating Syatems Concepts

Q23. Pre-emptive scheduling is the strategy of temporarily suspending a running process

1.  before the cpu time slice expires

2.  to allow starving process to run

3.  when it request i/o

4.  none of the above

Correct Answer : 1

QuestionID  :  11110         Subject Name  Operating Syatems Concepts

Q24. The signal the keyboard sends to the computer is special kind of message called__________

1.  Keyboard request

2.  Keyboard controller

3.  Interrupt Controller

4.  Interrupt Request

Correct Answer : 4

QuestionID  :  11112         Subject Name  Operating Syatems Concepts

Q25. When fork() is given-

1.  it creates a child process

2.  allocates slot in process table

3.  returns 0 to parent & ID to child

4.  All of the above.

Correct Answer : 1

QuestionID  :  11114         Subject Name  Operating Syatems Concepts

Q26. The problem of thrashing may be reduced by

1.  Using preparing mechanism

2.  Writing well structered programs

3.  Both 1 and 2

4.  Neither 1 nor 2

Correct Answer : 3

QuestionID  :  11115         Subject Name  Operating Syatems Concepts

Q27. the address sequence generated by a particular program executing in demand paging with 100 records per page with one free memory frame is recorded.what is the number of page fault; 100,200,430,499,510,530,560,120,220,240,260,320,370

1.  13

2.  7

3.  8

4.  10

Correct Answer : 4

QuestionID  :  11117         Subject Name  Operating Syatems Concepts

Q28. Which of the following service is not supported by Operating system ?

1.  Protection

2.  Accounting

3.  Compilation

4.  I/O operation

Correct Answer : 3

QuestionID  :  11118         Subject Name  Operating Syatems Concepts

Q29. Protection of memory is ensured using ------- and -------.

1.  paging,virtual memory

2.  base register ,limit register

3.  IP egister,hardware register

4.  scheduling,synchronization

Correct Answer : 2

QuestionID  :  11124         Subject Name  Operating Syatems Concepts

Q30. Necessary condition for deadlock are

1.  non preemption and circular wait

2.  mutual exclusion and partial allocation

3.  a and b

4.  None of these

Correct Answer : 3

QuestionID  :  11136         Subject Name  Operating Syatems Concepts

Q31. Efficient operation of computer system and Convinience for user are the goals of operating system.

Correct Answer : T

QuestionID  :  11137         Subject Name  Operating Syatems Concepts

Q32. When fork() is given-

1.  it creates a child process.

2.  Allocates slot in process table.

3.  returns 0 to parent and ID to child.

4.  all of the above.

Correct Answer : 4

QuestionID  :  11140         Subject Name  Operating Syatems Concepts

Q33. The first-fit,best-fit,worst-fit algorithm can be used for

1.  Contiguous memory allocation

2.  Linked memory allocation

3.  Indexed memory allocation

4.  All of the above

Correct Answer : 1

QuestionID  :  11142         Subject Name  Operating Syatems Concepts

Q34. The signal of the keyboard sends to the computer a special kind of message called

1.  keyboard request

2.  keyboard controller

3.  interrupt controller

4.  interrupt request

Correct Answer : 4

QuestionID  :  11143         Subject Name  Operating Syatems Concepts

Q35. Concurrent processes are processes that

1.  Do not overlap in time

2.  Overlap in time

3.  Are executed by a processor at the same time

4.  None of above

Correct Answer : 2

QuestionID  :  11144         Subject Name  Operating Syatems Concepts

Q36. The time of admission of job to ready queue to completion is_______

1.  Turnaround time

2.  Burst time

3.  Response time

4.  None of the above.

Correct Answer : 1

QuestionID  :  11145         Subject Name  Operating Syatems Concepts

Q37. A file system uses the contiguous space allocation mechanism for disk allocation .For better utilization of disk space ,this file system must use

1.  A garbage collection mechanism

2.  A disk compaction mechanism

3.  A linked-block allocation mechanism

4.  An indexed-block allocation mechanism

Correct Answer : 4

QuestionID  :  11146         Subject Name  Operating Syatems Concepts

Q38. Disk scheduling involves deciding

1.  which disk should be accessed next

2.  the order in which disk access request must be serviced

3.  the physical location where files should be accessed in the disk

4.  none of the above

Correct Answer : 2

QuestionID  :  11148         Subject Name  Operating Syatems Concepts

Q39. Which of the following is the most suitable scheduling scheme in real time operating system.

1.  round robin

2.  first come first served

3.  pre-emtive scheduling

4.  random scheduling

Correct Answer : 3

QuestionID  :  11149         Subject Name  Operating Syatems Concepts

Q40. The fastest strogage element is?

1.  CDRAM

2.  DRAM

3.  EDO-DRAM

4.  SDRAM

Correct Answer : 2

QuestionID  :  11150         Subject Name  Operating Syatems Concepts

Q41. If the C.P.U. scheduling Policy is priority scheduing without the pre-emption the average waiting time will be_________

1.  12.8 ms

2.  11.8 ms

3.  10.8 ms

4.  none of the above

Correct Answer : 3

QuestionID  :  11151         Subject Name  Operating Syatems Concepts

Q42. Which of the following CPU scheduling algorithm will prevent starvation problem.

1.  shortest-job-first

2.  priority scheduling

3.  priority scheduling with aging mechanism

4.  None of the above

Correct Answer : 3

QuestionID  :  11154         Subject Name  Operating Syatems Concepts

Q43. A ___________ is an intermediate main memory storage area holding the data in transit between user`s work area and the device

1.  buffer

2.  cache

3.  back up

4.  page

Correct Answer : 1

QuestionID  :  11155         Subject Name  Operating Syatems Concepts

Q44. The page replacement policy that some times leads to more page faults when size of memory is increased is

1.  FIFO

2.  LRU

3.  No such policy exists

4.  None of above

Correct Answer : 1

QuestionID  :  11161         Subject Name  Operating Syatems Concepts

Q45. The main purpose(s)of an operating system is/are________

1.  Convenience for the user.

2.  Efficient operation of the Computer system.

3.  Optimal use of Computer resources.

4.  All of the above

Correct Answer : 4

QuestionID  :  11163         Subject Name  Operating Syatems Concepts

Q46. Determine the number of page faults when reference to pages occur in the order -1,2,4,5,2,1,2,4.Assume that the main memory can accommodate 3 pages and the main memory already has the pages 1 and 2,with page 1 having been brought earlier than page 2(Assume LRU algorithm is used

1.  3

2.  5

3.  4

4.  none of the above

Correct Answer : 3

QuestionID  :  11169         Subject Name  Operating Syatems Concepts

Q47. ________________is an example of sharable resource and __________is an example of nonsharable resource

1.  memory,I/O devices

2.  I/O devices,memory

3.  memory,CPU-Clock

4.  CPU-Clock,memory

Correct Answer : 1

QuestionID  :  11173         Subject Name  Operating Syatems Concepts

Q48. Which of the following statement is true for a deadlock state

1.  The system cannot run any process

2.  The system can run process barring those involved in the deadlock

3.  A running process cannot request any new resource

4.  All processes in ready queue enter the wait

Correct Answer : 4

QuestionID  :  11175         Subject Name  Operating Syatems Concepts

Q49. CPU performance is based on:-

1.  ALU width.

2.  Clock speed .

3.  Number of instructions executed per second.

4.  both a and b.

Correct Answer : 3

QuestionID  :  11179         Subject Name  Operating Syatems Concepts

Q50. Thrashing is when more time is spent in paging than in actually running program.

Correct Answer : T

QuestionID  :  11181         Subject Name  Operating Syatems Concepts

Q51. Dijkstra`s banking algorithm in an o.s. solves the problem of

1.  deadlock avoidance

2.  deadlock detection

3.  mutual exclusion

4.  context switching

Correct Answer : 1

QuestionID  :  11183         Subject Name  Operating Syatems Concepts

Q52. Cascading Termination refers to termination of all child processes before parent terminates

1.  normally

2.  abnormally

3.  normally and abnormally

4.  none of above

Correct Answer : 4

QuestionID  :  11187         Subject Name  Operating Syatems Concepts

Q53. `Aging` is

1.  keeping track of cache contents

2.  keeping track of what pages are currently residing in the memory

3.  keeping track how many times the given page is refrenced

4.  increasing the priority of jobs to ensure termination in a finite time

Correct Answer : 4

QuestionID  :  11192         Subject Name  Operating Syatems Concepts

Q54. Premptive scheduling is the forceful deallocation of a resource.

Correct Answer : T

QuestionID  :  11193         Subject Name  Operating Syatems Concepts

Q55. A___________ operating system is an operating syatem which requires a timely response from a computer system

1.  Batch os

2.  Workstation

3.  a and b

4.  None of the above

Correct Answer : 4

QuestionID  :  11195         Subject Name  Operating Syatems Concepts

Q56. Suppose the architecture of a computer system is layered into the following four layers:-

1.  Operating System software.

2.  users application software.

3.  hardware and programming environment software.

4.  all of the above.

Correct Answer : 4

QuestionID  :  11196         Subject Name  Operating Syatems Concepts

Q57. In a multi-user OS,20 requests are made to a particular resource per hour,on an average.The probability that no requests are made in 45 minutes is

1.  (e)-15

2.  (e)-5

3.  1-(e)-5

4.  1-(e)-10

Correct Answer : 4

QuestionID  :  11199         Subject Name  Operating Syatems Concepts

Q58. Which of the following is not a part of a process control block(PCB).

1.  Values of a CPU registers

2.  CPU Scheduling information

3.  Memory limits of the process

4.  List of files accessible to the proces.

Correct Answer : 4

QuestionID  :  11200         Subject Name  Operating Syatems Concepts

Q59. RAID level 3 is also known as

1.  memory-style error-correcting code.

2.  Block-interleaved parity organization.

3.  Bit-interleaved parity organization.

4.  All of the above

Correct Answer : 2

QuestionID  :  11201         Subject Name  Operating Syatems Concepts

Q60. Following is not a IPC

1.  semaphore

2.  pipe

3.  shared memory

4.  Buffering

Correct Answer : 1

QuestionID  :  11206         Subject Name  Operating Syatems Concepts

Q61. For implementing a multiprogramming Operating System _________

1.  special support from processor is required

2.  special support from processor is not essential

3.  cache memory must be available

4.  more than one processor must be available

Correct Answer : 2

QuestionID  :  11207         Subject Name  Operating Syatems Concepts

Q62. A process is Thrashing if it spends more time on execution than paging

1.  True

2.  False

3.  None of the above.

4.  Partially True

Correct Answer : 2

QuestionID  :  11208         Subject Name  Operating Syatems Concepts

Q63. In multi programming environment

1.  A processor executes more than one process at a time.

2.  The program are developed by more than one person.

3.  More than one process resides in memory

4.  A single user can executes many programs at the same time.

Correct Answer : 3

QuestionID  :  11211         Subject Name  Operating Syatems Concepts

Q64. In a page segemented scheme of memory management, the segement table itself must have a page table because...

1.  the segement tabble is often too large to fit in one page

2.  each segment is seperated over a number of pages

3.  segement tables point to page tables and not to the physical location of the segement

4.  the processor`s description base register point to a page table

Correct Answer : 2

QuestionID  :  11212         Subject Name  Operating Syatems Concepts

Q65. UNIX uses _________ scheduling policy

1.  preemptive

2.  non-preemptive

3.  UNIX never folloe any sceduling policy

4.  NOne of the above

Correct Answer : 1

QuestionID  :  11215         Subject Name  Operating Syatems Concepts

Q66. A process refers to 5 pages A,B,C,D,E in order - A;B;C;D;A;B;E;A;B;C;D;E. If the page replacement algorithm is FIFO,the number of page transfer with an empty internal store of 4 frames is greater than for 3 frames.

Correct Answer : T

QuestionID  :  11222         Subject Name  Operating Syatems Concepts

Q67. Which of the following scheduling policy is well suited for a time-shared operating system?

1.  Shortest job first

2.  Round robin

3.  First-come-first-serve

4.  Elevator

Correct Answer : 2

QuestionID  :  11225         Subject Name  Operating Syatems Concepts

Q68. Circuit switching has two variants- connection oriented and connectionless

Correct Answer : F

QuestionID  :  11229         Subject Name  Operating Syatems Concepts

Q69. The Scheduling policy in case of Batch processing is

1.  Long Term Scheduling

2.  Short Term Scheduling

3.  Both 1 & 2

4.  None of above

Correct Answer : 3

QuestionID  :  11230         Subject Name  Operating Syatems Concepts

Q70. A virtual memory is required for

1.  Increasing the speed

2.  Increasing the addressing modes

3.  Overcoming size limitation of main memory

4.  Overcoming size limitation of cache memory

Correct Answer : 3

QuestionID  :  11231         Subject Name  Operating Syatems Concepts

Q71. Turnaround Time refers to delay between job submission and job completion.

Correct Answer : T

QuestionID  :  11235         Subject Name  Operating Syatems Concepts

Q72. The Motivations Behind Networks are 1)Resource Sharing 2)Computation Speedup 3)Reliability 4)Communication

1.  1,2

2.  1,3

3.  only 3

4.  All the Above

Correct Answer : 4

QuestionID  :  11238         Subject Name  Operating Syatems Concepts

Q73. A file is anything held on secondary storage

Correct Answer : T

QuestionID  :  11241         Subject Name  Operating Syatems Concepts

Q74. Which of the following is true about deadlock state?

1.  The system cannot run any process

2.  The system can run process barring those invloved in the deadlock

3.  A running process cannot request any new resource

4.  All process in the ready queue enter the wait queue

Correct Answer : 2

QuestionID  :  11242         Subject Name  Operating Syatems Concepts

Q75. In a typical unix set up the host machinbe is attached to the termnals through

1.  i/o card

2.  Disk controller card

3.  Sound blaster card

4.  4/8 - port contrller card

Correct Answer : 4

QuestionID  :  11250         Subject Name  Operating Syatems Concepts

Q76. single system image is obtained in case of Distributed system

Correct Answer : T

QuestionID  :  11252         Subject Name  Operating Syatems Concepts

Q77. Device Controller is a Hardware

Correct Answer : F

QuestionID  :  11253         Subject Name  Operating Syatems Concepts

Q78. Device files in UNIX are

1.  Device drivers

2.  Special Files

3.  Pipes

4.  Unstructured files

Correct Answer : 2

QuestionID  :  11257         Subject Name  Operating Syatems Concepts

Q79. A system has 3 processes sharing 4 resources.If each process needs a maximun of 2 units,deadlock ----------

1.  can never occur

2.  may occur

3.  has to occur

4.  none of the above

Correct Answer : 1

QuestionID  :  11258         Subject Name  Operating Syatems Concepts

Q80. Consider a computer with 8 Mbytes of the main memory & 128 K cache.The cache block size is 4K .It uses a direct mapping scheme for the cache management. how many different main memory blocks can map on to a given physical cache block

1.  2048

2.  256

3.  64

4.  none

Correct Answer : 3

QuestionID  :  11260         Subject Name  Operating Syatems Concepts

Q81. Which of the following statement is not true

1.  A directory is a special type of file.

2.  A directory is used to store file attribute.

3.  A directory is used to store file data.

4.  A directory is used to store file access information.

Correct Answer : 3

QuestionID  :  11265         Subject Name  Operating Syatems Concepts

Q82. Some computer systems support dual mode operation the user mode and the supervisor mode or monitor mode. These refer to the modes

1.  by which user programs handle their data

2.  By which OS executes user programs

3.  In which the processor and the associated hardware operate

4.  Of memory access

Correct Answer : 3

QuestionID  :  11270         Subject Name  Operating Syatems Concepts

Q83. Within `` piping and redirection metacharacters cannot be used.

Correct Answer : F

QuestionID  :  11271         Subject Name  Operating Syatems Concepts

Q84. Unix is the example of the Distributed operating system

Correct Answer : T

QuestionID  :  11273         Subject Name  Operating Syatems Concepts

Q85. In which of the following directory systems,is it possible to have multiple complete paths for a file,starting from the root directory ?

1.  Single level directory

2.  Two level directory

3.  Tree structured directory

4.  Acyclic graph directory

Correct Answer : 4

QuestionID  :  11276         Subject Name  Operating Syatems Concepts

Q86. Which of the following statements is not true?

1.  a directory is special type of file

2.  a directory is used to store file attributes

3.  a directory is used to store data

4.  a directory is used to store file access information

Correct Answer : 3

QuestionID  :  11277         Subject Name  Operating Syatems Concepts

Q87. Which of the Following operating Systems are not available for non-intel platforms

1.  Windows NT

2.  Solaris

3.  Linux

4.  All of the above

Correct Answer : 2

QuestionID  :  11279         Subject Name  Operating Syatems Concepts

Q88. LRU and optimal are popular algoritm of page replacement

Correct Answer : T

QuestionID  :  11280         Subject Name  Operating Syatems Concepts

Q89. $? gives the PID of last background process, where as $! gives the exit status of the last command executed.

Correct Answer : F

QuestionID  :  11281         Subject Name  Operating Syatems Concepts

Q90. SS402>myfile would redirect the standard output and standard error to the myfile.

Correct Answer : F

QuestionID  :  11283         Subject Name  Operating Syatems Concepts

Q91. In the systems which do not have multiple CPUS is the cache coharency is an issue while design.

Correct Answer : F

QuestionID  :  11289         Subject Name  Operating Syatems Concepts

Q92. Which of the following Device asychronous

1.  SSRAM

2.  EPROM

3.  Disk Controller

4.  all of the above

Correct Answer : 1

QuestionID  :  11291         Subject Name  Operating Syatems Concepts

Q93. Suppose the following files are present in the current directory: ashish arctan dac.doc dim.dwg document fag fibonacci finder fog folder sam si.c tarun zenith zombie Which files would be listed by the following command? Is fi*

1.  fibonacci finder

2.   zenith zombie

3.  fag zenith fibonacci finder

4.  None

Correct Answer : 1

QuestionID  :  11293         Subject Name  Operating Syatems Concepts

Q94. Suppose the following files are present in the current directory: ashish arctan dac.doc dim.dwg document fag fibonacci finder fog folder sam si.c tarun zenith zombie Which files would be listed by the following command? Is[!fd]*

1.  Displays all the files other than those whose names begin with `f`or `d`

2.  Displays all the files other than those whose names begin with `f`or `d`or `.c`

3.  Display all files

4.  None

Correct Answer : 1

QuestionID  :  11294         Subject Name  Operating Syatems Concepts

Q95. The I/O subsystem consist of

1.  A memory management component includind buffering, caching and spooling

2.  A general device driver interface

3.  drivers for specific hardware devices

4.  All of the above

Correct Answer : 4

QuestionID  :  11299         Subject Name  Operating Syatems Concepts

Q96. ________ is the coincidence of high paging traffic and low CPU utilization

1.  Thrashing

2.  spoolinh

3.  swapping

4.  All

Correct Answer : 1

QuestionID  :  11301         Subject Name  Operating Syatems Concepts

Q97. peak bandwidth of a 64 bit, 33 MHz based PCI bus would be...

1.  133MB/s

2.  266 MB/s

3.  512 MB/s

4.  33 MB/s

Correct Answer : 3

QuestionID  :  11304         Subject Name  Operating Syatems Concepts

Q98. x=3 y=5 z=10 if [\($x-eq 3\) -a \($y - eq 5 - 0 $z - eq 10\) ] then echo $x else echo $y fi

1.  2

2.  3

3.  none

4.  4

Correct Answer : 1

QuestionID  :  11625         Subject Name  Operating Syatems Concepts

Q99. SJF is the best sheduling policy

Correct Answer : T

QuestionID  :  11626         Subject Name  Operating Syatems Concepts

Q100. Paging allow protection

Correct Answer : F