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This set of Unix Operating System Multiple Choice Questions & Answers (MCQs) focuses on Unix Operating System Set 1

Q1 | Unix OS was first developed by
  • dennis ritchie
  • bjarne stroustrup
  • ken thompson
  • brian kernighan
Q2 | Unix OS was first developed at
  • microsoft corp. usa
  • at & t bell labs, usa
  • ibm, usa
  • borland international, usa
Q3 | Unix is written in
  • c language
  • ada language
  • perl language
  • pascal language
Q4 | Unix is a
  • single user, single tasking os
  • single user, multi-tasking os
  • multi-user, multi- tasking os
  • none
Q5 | Which of the following is a command for searching a pattern in a file?
  • find
  • b. group
  • c.look up.
  • none
Q6 | Unix Command can be typed in
  • lower case
  • upper case
  • both the cases
  • none
Q7 | Shell Program is stored in a file called
  • unix
  • sh
  • dd
  • cc
Q8 | WhicBh shell offers a command history feature
  • c shell
  • visual shell
  • bourne shell
  • korn shell
Q9 | The minimum number of links for any directory file are
  • 3
  • 4
  • 1
  • 2
Q10 | The default value of Umask is
  • 1024
  • 4021
  • 0022
  • 1001
Q11 | Binary executable required for system administration is usually placed in ________ directory.
  • letc
  • lusr
  • ldev
  • none
Q12 | All user directories are usually placed in _________ directory.
  • letc
  • lusr
  • ldev
  • none
Q13 | If there are three links for a file then the number of copies of the file would be
  • one
  • two
  • three
  • four
Q14 | After typing the contents of file test created by you by giving the command cat>test you save the contents by
  • pressing the keys ctrl-c
  • typing save and pressing enter
  • pressing esc key
  • pressing ctrl-d
Q15 | The file for which we do not have write permission can be deleted using the command
  • rm-i file
  • rm-i file
  • rm-r-file
  • rm-f-file
Q16 | The permission 746 can be represented as
  • rwxrwx- -x
  • rw- -w-r-x
  • rwxr-xr-x
  • rwxr- -rw–
Q17 | A Sticky bit applies to a file would mean that
  • no one can remove it
  • it would stick around in memory even when its execution is over
  • next time you login it would get executed on its own
  • none of the above
Q18 | The command pwd gives
  • present working directory
  • password in encrypted form
  • password in decrypted form
  • none
Q19 | Which of the following is not a unix command
  • cd
  • rm
  • pwd
  • del
Q20 | The size of any block in the unix file system is
  • 512 bytes
  • 1024 bytes
  • 2048 bytes
  • any of the above
Q21 | To find the block size on your file system the command is
  • blksz
  • szblk
  • chksz
  • cmchk
Q22 | Each entry in inode table is of size
  • 64 kb
  • 32kb
  • 32 bytes
  • 64 bytes
Q23 | The program contained in boot block, that loads kernel into memory is called
  • disk bootstrap program
  • master boot program
  • shell program
  • none of the above
Q24 | The state of the file system is contained in
  • boot block
  • a special block created by book block
  • super block
  • none of the above
Q25 | Which file gets executed when we use the passwd command
  • /etc/passwd
  • /etc/pwd
  • /bin/passwd
  • /passwd