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Linux Solved MCQs

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Science in Information Technology (BSc IT) , Bachelor of Science in Computer Science (BSc CS) .

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1.

Maximum how long can a Linux filename be?

A. 128 bytes
B. 255 bytes
C. 32 bytes
D. 64 bytes
Answer» B. 255 bytes
discuss
2.

Which combination of keys is used to exit from terminal?

A. Ctrl + t
B. Ctrl + z
C. Ctrl + d
D. Ctrl + e
Answer» C. Ctrl + d
discuss
3.

Which command(s) is/are used to get help about a command in Linux?

A. info
B. man
C. None of these
D. Both a and b
Answer» A. info
discuss
4.

Which command is used to get the kernel version in Linux?

A. uname -r
B. kernel
C. uname -n
D. uname –s
Answer» A. uname -r
discuss
5.

Which command is used to list all the files in your current directory(including hidden)?

A. ls -l
B. ls -t
C. ls -a
D. ls –i
Answer» C. ls -a
discuss
6.

Which command is/are used to remove directory in Linux?

A. rmdir
B. rm -r
C. only b
D. Both a and b
Answer» D. Both a and b
discuss
7.

Which of the following command is used to create file in Linux?

A. touch
B. cat
C. echo
D. All of the above
Answer» D. All of the above
discuss
8.

In Linux everything stored as a

A. file
B. directory
C. executables
D. None of the above
Answer» A. file
discuss
9.

Which of the following command can be used as an alternative to echo command?

A. print
B. printr
C. printf
D. none of these
Answer» C. printf
discuss
10.

Which command is used see the list of users who are currently logged-in?

A. login
B. users
C. who
D. which
Answer» C. who
discuss
11.

Which directory in Linux contains all the config file of the system?

A. /etc
B. /var
C. /lib
D. /bin
Answer» A. /etc
discuss
12.

Which of the following command is used to count number of lines in a file?

A. wc -l
B. wc -c
C. wc -w
D. None of these
Answer» A. wc -l
discuss
13.

Which command is used to copy entire directory?

A. cp -r
B. cp -i
C. cp
D. none of these
Answer» A. cp -r
discuss
14.

Which special character should be avoided during naming a file?

A. .(dot)
B. $
C. _(underscore)
D. -(Hyphen)
Answer» D. -(Hyphen)
discuss
15.

Suppose I am in /etc directoy, after executing cd .(single dot), where am I now?

A. /etc
B. /(root)
C. /home
D. None of these
Answer» A. /etc
discuss
16.

mv command can be used to ?

A. Move the file to different directory.
B. Renaming a file
C. Both a and b.
D. Only a.
Answer» C. Both a and b.
discuss
17.

Which command is used to print the login shell of an user?

A. echo $SHELL
B. echo $LOGIN
C. echo $LSHELL
D. None of the Above
Answer» A. echo $SHELL
discuss
18.

which command is used to print the current working direcotry?

A. pwd
B. echo $PWD
C. Both A and B
D. Only A
Answer» C. Both A and B
discuss
19.

Which command is used to set terminal IO characteristic?

A. tty
B. ctty
C. ptty
D. sty
Answer» D. sty
discuss
20.

Which option of ls command used to view file inode number

A. –l
B. -o
C. –a
D. –i
Answer» D. –i
discuss
21.

Which directory contains all the files needed to boot the Linux system?

A. /dev
B. /boot
C. /bin
D. none
Answer» B. /boot
discuss
22.

What is the right command to save file and exit in Vim?

A. :wq
B. :a
C. :q
D. :q!
Answer» A. :wq
discuss
23.

Which of the following is not an editor?

A. expr
B. vi
C. emacs
D. ex
Answer» A. expr
discuss
24.

In a date +format, you add the hour in 24 hours format using:

A. %f
B. %H
C. %F
D. %h
Answer» B. %H
discuss
25.

What command is used with vi editor to delete a single character?

A. x
B. y
C. a
D. None of the above
Answer» A. x
discuss
26.

Which of the following is not a communication command?

A. grep
B. mail
C. mesg
D. write
Answer» A. grep
discuss
27.

What command is used with vi editor to replace text from cursor to right

A. S
B. s
C. R
D. r
Answer» C. R
discuss
28.

What command is used with vi editor to move back to the beginning of a word?

A. w
B. e
C. a
D. b
Answer» D. b
discuss
29.

What command is used with vi editor to search a pattern in the forward direction?

A. ??
B. //
C. ?
D. /
Answer» D. /
discuss
30.

What command is used with vi editor to append text at end of line?

A. I
B. i
C. a
D. A
Answer» D. A
discuss
31.

Which of the following is not a filter command?

A. sort
B. wc
C. grep
D. cat
Answer» D. cat
discuss
32.

While executing a command, the shell

A. Executes it in the same process (as shell)
B. Creates a child shell to execute it
C. Loads a special program to take care of the execution
D. None of the mentioned
Answer» B. Creates a child shell to execute it
discuss
33.

Which variable contains current shell process id

A. $*
B. $?
C. $$
D. $!
Answer» C. $$
discuss
34.

Hidden files are

A. Those whose ‘read’ bit is set to ‘h’
B. Permitted for (can be accessed) only superusers
C. Files that begin with a ‘.’
D. Files that cannot be opened by ordinary user for writing
Answer» C. Files that begin with a ‘.’
discuss
35.

Shell is ?

A. Command Interpreter
B. Interface between Kernel and Hardware
C. Interface between user and applications
D. Command Compiler
Answer» A. Command Interpreter
discuss
36.

Which command searches the string in file opened in vi editor?

A. / or ?
B. f or F
C. t or T
D. none of the mentioned
Answer» A. / or ?
discuss
37.

Which command sets the number for all lines?

A. :set li
B. :set ln
C. :set nu
D. :set nl
Answer» C. :set nu
discuss
38.

Which of the following is true?

A. Shell is a process and can be started by superuser only
B. Shell is a built-in Kernel functionality
C. Shell is a wrapper for all the commands and utilities
D. None of the mentioned
Answer» C. Shell is a wrapper for all the commands and utilities
discuss
39.

The permission -rwxr–r– represented in octal expression will be

A. 777
B. 666
C. 744
D. 711
Answer» C. 744
discuss
40.

Effective group id can be set using following permission

A. 0777
B. 2666
C. 4744
D. 1711
Answer» B. 2666
discuss
41.

The permission -rwSr–r– represented in octal expression will be

A. 0777
B. 2666
C. 4744
D. 4644
Answer» D. 4644
discuss
42.

Which command is used to assign read-write permission to the owner?

A. chmod a+r file
B. chmod o+r file
C. chmod u=rw file
D. chmod og-r file
Answer» C. chmod u=rw file
discuss
43.

Which of the following umask settings doesn’t allow execute permission to be set by default on directory files

A. 222
B. 111
C. 000
D. 444
Answer» C. 000
discuss
44.

Write the command to display the current date in the form dd/mm/yyyy.

A. date +%d/%m/%Y
B. date +”%d/%m/%Y”
C. date +/%d/%m/20%y
D. date +”/%d/%m/20%y”
Answer» A. date +%d/%m/%Y
discuss
45.

How to execute ls command inside a vi editor?

A. !ls
B. :ls
C. :!ls
D. we can’t execute
Answer» C. :!ls
discuss
46.

What communication command provides communication to another user logged on by writing to the bottom of their terminal?

A. talk
B. write
C. chat
D. tr
Answer» A. talk
discuss
47.

Which of the following command output contains userid?

A. ls
B. help
C. date
D. ls –l
Answer» D. ls –l
discuss
48.

pwd command displays

A. user password
B. password file content
C. present working directory
D. none of the mentioned
Answer» C. present working directory
discuss
49.

What is the default number of files open per user process?

A. 0
B. 1
C. 2
D. 3
Answer» D. 3
discuss
50.

Solaris is the name of a flavor of UNIX from

A. HP
B. IBM
C. Digital Equipment Corp
D. Sun Microsystems
Answer» D. Sun Microsystems
discuss

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