Question 1

Unix OS was first developed by
A)dennis ritchie
B)bjarne stroustrup
C)ken thompson
D)brian kernighan

Accepted Answer

C

Question 2

Unix OS was first developed at
A)microsoft corp. usa
B)at & t bell labs, usa
C)ibm, usa
D)borland international, usa

Accepted Answer

Unix OS was first developed at AT&T Bell Labs in the USA. This development was led by Ken Thompson, Dennis Ritchie, and others in the late 1960s and early 1970s.

Question 3

Unix is written in
A)c language
B)ada language
C)perl language
D)pascal language

Accepted Answer

Unix was originally written in assembly language, but was later rewritten in C language, which significantly contributed to its portability and success.

Question 4

Unix is a
A)single user, single tasking os
B)single user, multi-tasking os
C)multi-user, multi- tasking os
D)none

Accepted Answer

Unix is designed as a multi-user, multi-tasking operating system, allowing multiple users to run multiple tasks simultaneously.

Question 5

Which of the following is a command for searching a pattern in a file?
A)find
B)grep
C)look up.
D)none

Accepted Answer

The command "grep" is used for searching plain-text data sets for lines that match a regular expression.

Question 6

Unix Command can be typed in
A)lower case
B)upper case
C)both the cases
D)none

Accepted Answer

Unix commands are case-sensitive and are typically typed in lower case.

Question 7

Shell Program is stored in a file called
A)unix
B)sh
C)dd
D)cc

Accepted Answer

Shell programs are typically stored in files with a ".sh" extension, indicating that they are shell script files.

Question 8

WhicBh shell offers a command history feature
A)c shell
B)visual shell
C)bourne shell
D)korn shell

Accepted Answer

The answer of WhicBh shell offers a command history feature
A)c...

Question 9

The minimum number of links for any directory file are
A)3
B)4
C)1
D)2

Accepted Answer

The minimum number of links for any directory file is 2. This includes one link for the directory itself and one for the '.' (dot) entry that refers to the directory itself.

Question 10

The default value of Umask is
A)1024
B)4021
C)0022
D)1001

Accepted Answer

The default value of Umask (user file-creation mode mask) in most Unix/Linux systems is 0022. This setting controls the default permissions for newly created files and directories, ensuring that by default, new files are readable and writable by the owner, and readable by others, but not writable or executable by others.

Question 11

Binary executable required for system administration is usually placed in ________ directory.
A)letc
B)lusr
C)ldev
D)none

Accepted Answer

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

Question 12

All user directories are usually placed in _________ directory.
A)letc
B)lusr
C)ldev
D)none

Accepted Answer

User directories are typically placed in the /usr directory in Unix-like operating systems.

Question 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

Accepted Answer

In a file system, creating links (hard links or symbolic links) to a file does not create additional copies of the file itself. Instead, all links point to the same underlying file data. Therefore, regardless of the number of links, there is only one copy of the file.

Question 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

Accepted Answer

Pressing Ctrl-D saves the contents when using the `cat>filename` command to create or edit a file in Unix/Linux environments. This key combination signifies the end of the input from the terminal.

Question 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

Accepted Answer

The command `rm -f file` is used to forcefully delete a file, even if the user does not have write permission on the file. The `-f` option stands for 'force', which overrides the usual checks for write permission.

Question 16

The permission 746 can be represented as
A)rwxrwx- -x
B)rw- -w-r-x
C)rwxr-xr-x
D)rwxr- -rw-

Accepted Answer

The answer of The permission 746 can be represented as
A)rwxrwx-...

Question 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

Accepted Answer

The sticky bit, when applied to a file, indicates that the file should remain in cache memory for quicker access, rather than being immediately purged once its execution is complete. This does not affect file permissions or auto-execution settings.

Question 18

The command pwd gives
A)present working directory
B)password in encrypted form
C)password in decrypted form
D)none

Accepted Answer

The command pwd in Unix/Linux systems stands for "Print Working Directory." It outputs the path of the current directory you are in.

Question 19

Which of the following is not a unix command
A)cd
B)rm
C)pwd
D)del

Accepted Answer

The command "del" is not a Unix command; it is a command used in DOS and Windows operating systems to delete files. The other options, "cd" (change directory), "rm" (remove files or directories), and "pwd" (print working directory), are all standard Unix commands.

Question 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

Accepted Answer

The size of a block in the Unix file system can vary, and it can indeed be 512 bytes, 1024 bytes, 2048 bytes, or other sizes depending on the specific file system implementation and configuration. Therefore, "any of the above" is correct.

Quiz 1: Introduction to Unix Operating System and Shell Programming

Unix OS was first developed by

Unix OS was first developed at

Unix is written in

Unix is a

Which of the following is a command for searching a pattern in a file?

Unix Command can be typed in

Shell Program is stored in a file called

WhicBh shell offers a command history feature

The minimum number of links for any directory file are

The default value of Umask is

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

All user directories are usually placed in _________ directory.

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

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

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

The permission 746 can be represented as

A Sticky bit applies to a file would mean that

The command pwd gives

Which of the following is not a unix command

The size of any block in the unix file system is