McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Science in Computer Science SY (BSc CS) , Bachelor of Science in Computer Science (BSc CS) .
| 1. |
Unix OS was first developed by |
| A. | dennis ritchie |
| B. | bjarne stroustrup |
| C. | ken thompson |
| D. | brian kernighan |
| Answer» C. ken thompson | |
| 2. |
Unix OS was first developed at |
| A. | microsoft corp. usa |
| B. | at & t bell labs, usa |
| C. | ibm, usa |
| D. | borland international, usa |
| Answer» B. at & t bell labs, usa | |
| 3. |
Unix is written in |
| A. | c language |
| B. | ada language |
| C. | perl language |
| D. | pascal language |
| Answer» A. c language | |
| 4. |
Unix is a |
| A. | single user, single tasking os |
| B. | single user, multi-tasking os |
| C. | multi-user, multi- tasking os |
| D. | none |
| Answer» C. multi-user, multi- tasking os | |
| 5. |
Which of the following is a command for searching a pattern in a file? |
| A. | find |
| B. | grep |
| C. | look up. |
| D. | none |
| Answer» B. grep | |
| 6. |
Unix Command can be typed in |
| A. | lower case |
| B. | upper case |
| C. | both the cases |
| D. | none |
| Answer» A. lower case | |
| 7. |
Shell Program is stored in a file called |
| A. | unix |
| B. | sh |
| C. | dd |
| D. | cc |
| Answer» B. sh | |
| 8. |
WhicBh shell offers a command history feature |
| A. | c shell |
| B. | visual shell |
| C. | bourne shell |
| D. | korn shell |
| Answer» C. bourne shell | |
| 9. |
The minimum number of links for any directory file are |
| A. | 3 |
| B. | 4 |
| C. | 1 |
| D. | 2 |
| Answer» D. 2 | |
| 10. |
The default value of Umask is |
| A. | 1024 |
| B. | 4021 |
| C. | 0022 |
| D. | 1001 |
| Answer» C. 0022 | |
| 11. |
Binary executable required for system administration is usually placed in ________ directory. |
| A. | letc |
| B. | lusr |
| C. | ldev |
| D. | none |
| Answer» A. letc | |
| 12. |
All user directories are usually placed in _________ directory. |
| A. | letc |
| B. | lusr |
| C. | ldev |
| D. | none |
| Answer» B. lusr | |
| 13. |
If there are three links for a file then the number of copies of the file would be |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» A. one | |
| 14. |
After typing the contents of file test created by you by giving the command cat>test you save the contents by |
| A. | pressing the keys ctrl-c |
| B. | typing save and pressing enter |
| C. | pressing esc key |
| D. | pressing ctrl-d |
| Answer» D. pressing ctrl-d | |
| 15. |
The file for which we do not have write permission can be deleted using the command |
| A. | rm-i file |
| B. | rm-i file |
| C. | rm-r-file |
| D. | rm-f-file |
| Answer» D. rm-f-file | |
| 16. |
The permission 746 can be represented as |
| A. | rwxrwx- -x |
| B. | rw- -w-r-x |
| C. | rwxr-xr-x |
| D. | rwxr- -rw– |
| Answer» D. rwxr- -rw– | |
| 17. |
A Sticky bit applies to a file would mean that |
| A. | no one can remove it |
| B. | it would stick around in memory even when its execution is over |
| C. | next time you login it would get executed on its own |
| D. | none of the above |
| Answer» B. it would stick around in memory even when its execution is over | |
| 18. |
The command pwd gives |
| A. | present working directory |
| B. | password in encrypted form |
| C. | password in decrypted form |
| D. | none |
| Answer» A. present working directory | |
| 19. |
Which of the following is not a unix command |
| A. | cd |
| B. | rm |
| C. | pwd |
| D. | del |
| Answer» D. del | |
| 20. |
The size of any block in the unix file system is |
| A. | 512 bytes |
| B. | 1024 bytes |
| C. | 2048 bytes |
| D. | any of the above |
| Answer» D. any of the above | |
| 21. |
To find the block size on your file system the command is |
| A. | blksz |
| B. | szblk |
| C. | chksz |
| D. | cmchk |
| Answer» D. cmchk | |
| 22. |
Each entry in inode table is of size |
| A. | 64 kb |
| B. | 32kb |
| C. | 32 bytes |
| D. | 64 bytes |
| Answer» D. 64 bytes | |
| 23. |
The program contained in boot block, that loads kernel into memory is called |
| A. | disk bootstrap program |
| B. | master boot program |
| C. | shell program |
| D. | none of the above |
| Answer» A. disk bootstrap program | |
| 24. |
The state of the file system is contained in |
| A. | boot block |
| B. | a special block created by book block |
| C. | super block |
| D. | none of the above |
| Answer» C. super block | |
| 25. |
Which file gets executed when we use the passwd command |
| A. | /etc/passwd |
| B. | /etc/pwd |
| C. | /bin/passwd |
| D. | /passwd |
| Answer» C. /bin/passwd | |
| 26. |
The command cal j 1997 would give the output as |
| A. | the calendar of jan, june and july 1997 |
| B. | only calendar of jan 1997 |
| C. | an error |
| D. | none of the above |
| Answer» C. an error | |
| 27. |
The output of command banner “Unix shell programming” would be |
| A. | a banner showing ‘unix’,’shell’ and ‘programming’ words displayed in separate lines |
| B. | a banner showing ‘unix shell’ in one single line |
| C. | nothing |
| D. | a banner showing ‘unix shell programming’ in one line. |
| Answer» B. a banner showing ‘unix shell’ in one single line | |
| 28. |
To see the last access time of various files in a file system the command is |
| A. | is-iu |
| B. | is-i |
| C. | is-acc |
| D. | is-mt |
| Answer» A. is-iu | |
| 29. |
To ascertain what are the contents of the file in your the system the best way would be |
| A. | do a cat command on each file and find its contents |
| B. | use the command cat* |
| C. | use the command file* |
| D. | none of the above |
| Answer» C. use the command file* | |
| 30. |
Which of these is not a command of Unix related with DOS |
| A. | dosdir a:proj |
| B. | doscopy trial a:/ |
| C. | doscp/home/proj/prg a:/ |
| D. | dosls |
| Answer» B. doscopy trial a:/ | |
| 31. |
Which of following commands do not belong to multiple file editing commands |
| A. | :n! |
| B. | :q! |
| C. | :rnew! |
| D. | all the above |
| Answer» D. all the above | |
| 32. |
The difference between the commands ps –e and ps –a is |
| A. | ps –e gives details of every process running in memory whereas ps –a gives output for all the process that you have launched |
| B. | ps –e gives details of every process running in memory whereas ps –a gives details of all user processes |
| C. | no difference , both give same output |
| D. | none of the above |
| Answer» B. ps –e gives details of every process running in memory whereas ps –a gives details of all user processes | |
| 33. |
The father of all processes is |
| A. | root |
| B. | sh |
| C. | sched |
| D. | init |
| Answer» C. sched | |
| 34. |
The process id numbers of the processes vhand,bdflush,sched and init are |
| A. | 1,2,3 and 4 |
| B. | 2,3,0 and 1 |
| C. | 3,4,1 and 2 |
| D. | 0,1,2 and 3 |
| Answer» B. 2,3,0 and 1 | |
| 35. |
Which of the following is not true regarding the command $ nohup cat *.let | nohup sort >f1 & |
| A. | the process would die if the user logs out before the command’s execution is over |
| B. | if the user logs out the output of sort would be dtored in a file nohup.out |
| C. | it is optional to give nohup before sort |
| D. | this background process is also known as a deamon process |
| Answer» A. the process would die if the user logs out before the command’s execution is over | |
| 36. |
Which of the following is not true regards the kill command |
| A. | super user can kill deamon processes |
| B. | for sure kill the signal no is 9 |
| C. | there is no surety that the shell process will get killed by the command kill |
| D. | using kill command you can kill other user’s processes too |
| Answer» A. super user can kill deamon processes | |
| 37. |
Which of the following is not true |
| A. | the at command permits you to receive messages only by mail |
| B. | a person’s login name appears in the file at.allow if he is not allowed to use the at command |
| C. | both are false |
| D. | both are true |
| Answer» C. both are false | |
| 38. |
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 |
| A. | message –on |
| B. | msg –o |
| C. | mesg –y |
| D. | message–y |
| Answer» C. mesg –y | |
| 39. |
The command that unix offers to a user to find out whether he can send messages to a particular terminal are |
| A. | finger and who |
| B. | finger –mesg and who –t |
| C. | finger –i and who –t |
| D. | finger –i and who –t |
| Answer» D. finger –i and who –t | |
| 40. |
If the user has read a news item he cannot read it again because of creation of the file |
| A. | _news_time |
| B. | news.time |
| C. | .news.time |
| D. | .news_time |
| Answer» D. .news_time | |
| 41. |
To read the stale news the option available is |
| A. | news –a |
| B. | delete the file /usr/news |
| C. | delete the file _news.time |
| D. | delete the file .news_time |
| Answer» A. news –a | |
| 42. |
The message of the day is stored in a file called |
| A. | /etc/profile |
| B. | /etc/motv |
| C. | .profile |
| D. | autoexec.bat |
| Answer» B. /etc/motv | |
| 43. |
The incoming mail of user with the login name aa12 is stored in the file |
| A. | /usr/spool/mail/aa12 |
| B. | /usr/aa12/mbox |
| C. | /spool/mail/aa12 |
| D. | /usr/aa12/.mbox |
| Answer» A. /usr/spool/mail/aa12 | |
| 44. |
.mailrc is the file |
| A. | which stores the incoming mail |
| B. | which is used to type the mail to be sent |
| C. | which is invoked when the mail command is executed |
| D. | which permits you to customize the vi environment |
| Answer» C. which is invoked when the mail command is executed | |
| 45. |
The escape sequence \033[4m is used to |
| A. | underlying characters |
| B. | mark them as bold |
| C. | display them in reverse video |
| D. | none of the above |
| Answer» B. mark them as bold | |
| 46. |
Which of the following assignments is illegal |
| A. | a=’ls’ |
| B. | b=’ls –l’ |
| C. | c=’1972’ |
| D. | d=’who | grepaal’ |
| Answer» C. c=’1972’ | |
| 47. |
Which of the following assignment is illegal |
| A. | a=’cat file’ |
| B. | a=100 b=50 |
| C. | age=25 |
| D. | all the above |
| Answer» C. age=25 | |
| 48. |
A null variable a can be created using |
| A. | a= |
| B. | a=’’ |
| C. | a=”” |
| D. | all the above |
| Answer» D. all the above | |
| 49. |
The shell metacharacter $# represents |
| A. | total number of arguments supplied to the shell script |
| B. | total number of files in the current directory |
| C. | total number of users who have logged in |
| D. | total number of processes running in the background |
| Answer» A. total number of arguments supplied to the shell script | |
| 50. |
When we are executing a shell script the shell acts as |
| A. | an interpreter |
| B. | a compiler |
| C. | an operating system |
| D. | none of the above |
| Answer» A. an interpreter | |
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