Unix MCQs Quiz Multiple Choice Questions & Answers

1. Unix OS was first developed by

1. Dennis Ritchie
2. Bjarne stroustrup
3. Ken Thompson
4. Brian Kernighan

2. Unix OS was first developed at

1. Microsoft corp. USA
2. AT & T Bell Labs, USA
3. IBM, USA
4. Borland International, USA

3. .mailrc is the file

1. Which stores the incoming mail
2. Which is used to type the mail to be sent
3. Which is invoked when the mail command is executed
4. Which permits you to customize the vi environment

4. A shell variable cannot start with

1. An alphabet
2. A number
3. A special symbol other than an underscore
4. Both b and c above

5. A Sticky bit applies to a file would mean that

1. No one can remove it
2. It would stick around in memory even when its execution is over
3. Next time you login it would get executed on its own
4. None of the above

6. After typing the contents of file test created by you by giving the command cat>test you save the contents by

1. Pressing the keys ctrl-c
2. Typing save and pressing enter
3. Pressing Esc key
4. Pressing ctrl-d

7. After you have entered text in your file, to save and quit vi you will use

1. Esc shift ZZ
2. Shift ZZ
3. Esc:q Enter
4. None of the above

8. All user directories are usually placed in..................directory.

1. Letc
2. lusr
3. ldev
4. none

9. An until loop ensures that the statement within the loop get executed

1. Only once
2. Atleast once
3. Not even once
4. None of the above

10. Binary executable required for system administration is usually placed in................directory.

1. Letc
2. lusr
3. ldev
4. none

11. Each entry in inode table is of size

1. 64 kb
2. 32kb
3. 32 bytes
4. 64 bytes

12. 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

13. Hierarchy decides which operator

1. Is most important
2. Is used first
3. Is fastest
4. Operates on largest numbers

14. If the user has read a news item he cannot read it again because of creation of the file

1. _news_time
2. news.time
3. .news.time
4. .news_time

15. If there are three links for a file then the number of copies of the file would be

1. One
2. two
3. three
4. four

16. In vi editor, forward search is performed using the command.

1. :pat
2. :pat
3. /pat
4. All of the above

17. 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

18. On executing the command Shift $v

1. The positional parameters would be shifted by the value of the variable v
2. The positional parameters would be shifted by 1
3. The positional parameters would not be shifted at all
4. This command would result into an error

19. Shell Program is stored in a file called

1. Unix
2. Sh
3. Dd
4. Cc

20. The break statement is used to exit from

1. An if statement
2. A for loop
3. A program
4. None of the above

21. The command cal j 1997 would give the output as

1. The calendar of jan, june and july 1997
2. Only calendar of jan 1997
3. An error
4. None of the above

22. The command head f1 would display

1. First line of the file f1
2. Nothing
3. First 10 lines of the file f1
4. The whole file f1

23. The command is used to compare the files is known as

1. Comp
2. Cmp
3. Do
4. Ccp

24. The command pwd gives

1. Present working directory
2. Password in encrypted form
3. Password in decrypted form
4. None

25. 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

26. The command which transcribes the standard input to the standard output and also makes a copy of the same in a file is

1. Tee
2. Tr
3. Sort
4. Grep

27. The cp command uses

1. Standard input file
2. Standard output file
3. Both input and output file
4. Neither input nor output file

28. The default value of Umask is

1. 1024
2. 4021
3. 22
4. 1001

29. The difference between the commands ps –e and ps –a is

1. Ps –e gives details 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

30. The escape sequence 33[4m is used to

1. underlying characters
2. mark them as bold
3. display them in reverse video
4. none of the above

31. The expression expr -2 % 7 evaluates to

1. 2
2. -2
3. 0.285

32. The expression expr -7 % 2evaluates to

1. 1
2. -1
3. -3.5

33. The father of all processes is

1. Root
2. Sh
3. Sched
4. Init

34. The file for which we do not have write permission can be deleted using the command

1. rm-i file
2. rm-I file
3. rm-r-file
4. rm-f-file

35. The incoming mail of user with the login name aa12 is stored in the file

1. /usr/spool/mail/aa12
2. /usr/aa12/mbox
3. /spool/mail/aa12
4. /usr/aa12/.mbox

36. The message of the day is stored in a file called

1. /etc/profile
2. /etc/motv
3. .profile
4. Autoexec.bat

37. The minimum number of links for any directory file are

1. 3
2. 4
3. 1
4. 2

38. The output of command banner Unix shell programming would be

1. A banner showing unix,shell and programming words displayed in separate lines
2. A banner showing unix shell in one single line
3. Nothing
4. A banner showing unix shell programming in one line.

39. The permission 746 can be represented as

1. rwxrwx- -x
2. rw- -w-r-x
3. rwxr-xr-x
4. rwxr- -rw–

40. The process id numbers of the processes vhand,bdflush,sched and init are

1. 1,2,3 and 4
2. 2,3,0 and 1
3. 3,4,1 and 2
4. 0,1,2 and 3

41. The program contained in boot block, that loads kernel into memory is called

1. Disk Bootstrap program
2. Master boot program
3. Shell program
4. None of the above

42. The second set of the three permissions (r-) indicates that

1. group has read permission only
2. other has read permission only
3. owner has read permission only
4. group has write permission only

43. The shell metacharacter $# 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 processes running in the background

44. The size of any block in the unix file system is

1. 512 bytes
2. 1024 bytes
3. 2048 bytes
4. Any of the above

45. The state of the file system is contained in

1. Boot block
2. A special block created by Book Block
3. Super Block
4. None of the above

46. To ascertain what are the contents of the file in your the system the best way would be

1. Do a cat command on each file and find its contents
2. Use the command cat*
3. Use the command file*
4. None of the above

47. To change the access time of a file to 12:40 PM on 26th Jan 1997 the command would be

1. Touch –a 2601971240 file
2. Touch –a 1240260197 file
3. Touch –a 0126124097 file
4. Touch –a 9701261240 file

48. To find the block size on your file system the command is

1. Blksz
2. Szblk
3. Chksz
4. Cmchk

49. To read the stale news the option available is

1. news –a
2. Delete the file /usr/news
3. Delete the file _news.time
4. Delete the file .news_time

50. To see the last access time of various files in a file system the command is

1. Is-Iu
2. Is-I
3. Is-acc
4. Is-mt