Linux MCQ: Linux Multiple Choice Questions and Answers

Linux MCQ with answers and explanations for placement tests and job interviews. These solved Linux MCQs are useful for the campus placement for all freshers including Engineering Students, MCA students, Computer and IT Engineers, etc.

Our Linux MCQ (Linux multiple Choice Questions ) focuses on various Linux commands and their command-line options & parameters. It will be useful for anyone learning Linux Basics, Essentials, and/or Fundamentals. We will regularly update the quiz and most interesting thing is that questions come in a random sequence. So every time you will feel new questions.

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Guideline of Linux MCQ:

This Linux MCQ is intended for checking your Linux knowledge. It takes 1 hour to pass the Linux MCQ. If you don’t finish the Linux MCQ within the mentioned time, all the unanswered questions will count as wrong. You can miss the questions by clicking the “Next” button and return to the previous questions by the “Previous” button. Every unanswered question will count as wrong. MCQ on Linux has features of randomization which feel you a new question set at every attempt.

In this Linux Quiz, we have also implemented a feature that not allowed the user to see the next question or finish the quiz without attempting the current Linux MCQ.

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Linux MCQ: Linux Multiple Choice Questions and Answers

1 / 60

What NFS option allows the root user to access NFS shares as the root user?

no_admin_squash

no_root_squash

allow_root_access

all_squash

2 / 60

Which command allows you to do packet analysis from the command line?

wireshark

ethtool

netstat

tcpdump

3 / 60

Why doesn't passwd -l keep a user from logging in via other methods?

The passwd command is not used for locking passwords.

There is no password -l option.

It locks only the password, not the account, so users can still authenticate with keys or other methods.

It does lock the account, keeping users from logging in even if they are using other authentication methods.

4 / 60

What are the three sets of permission for a file?

Administrator, group, others

User, group, others

User, standard user, others

Administrator, standard user, others

5 / 60

To remove all ACLs from a directory, use setfacl with which options?

-d

-k

-b

-x

6 / 60

You send an email to a remote client using the following syntax. What will be in the body of the email?

date | mail -s "This is a remote test" user1@rhhost1.localnet.com

"This is a remote test"

the date, the time, and the words "This is a remote test"

The email subject shows "This is a remote test" but the body of the email will be empty.

the current date and time

7 / 60

When using iproute2, how do you show routing information for an IPv6 network?

route -ipv6

route

ip -6 route show

ip route show

8 / 60

How would you describe PCP (Performance Co-Pilot)?

It is an application testing suite used to profile programming code.

It is a local command used for monitoring local system resources in real time.

It is a set of tools, services, and libraries for gathering and analyzing performance measures.

It is a tool designed to change system configuration for purposes of optimization.

9 / 60

Which command would you use to get comprehensive documentation about any command in Linux?

Help command

Echo command

Locate command

Man command

Get command

10 / 60

In a systemd-based OS, you can change the system hostname by editing /etc/hostname manually and then doing what?

Restart dhcpd.

Run /etc/hostname.

Nothing, the system notices automatically.

Notify systemd to update it by restarting the systemd-hostnamed service.

11 / 60

What does the /etc/nsswitch.conf file manage?

priority of one DNS server over another

per network interface DNS server configuration

alternative DNS services

sources for name service information

12 / 60

Which command will tell you how long a system has been running?

log

uptime

runtime

access

13 / 60

What would this command output?

ps -e --format uid,pid,ppid,%cpu,cmd

the user ID, process ID, parent process ID, CPU usage, and command name of a process

the user ID, group ID, parent process ID, CPU usage, and command name of a process

the UUID, process ID, parent process ID, CPU usage, and command name of a process

All of the above.

14 / 60

What is the /etc/hosts file used for?

resolving the local name

blocking sites using iptables

setting the hostname

configuring DNS name servers

15 / 60

What character class is equal to this set?

[0-9]

[[:alnum:]]

[[:digit:]]

[[:alpha:]]

[[:num:]]

16 / 60

What would this locate command show?

locate --regexp '^/usr.*pixmaps.*jpg$'

all files in a directory named pixmaps

all files ending in ".jpg"

all file paths that start with "/usr", include the word "pixmaps", and end with ".jpg"

all file paths that include "/usr/pixmaps" and end with ".jpg"

17 / 60

To configure the Kerberos client, which command should you use to import the keytab file?

krb5-workstation

ktutil

pam_krb5

kdb5_util

18 / 60

Which command is used to make a shell variable known to subsequently executed programs?

Export

Announce

Env

Transfer

19 / 60

What does this command string do?

find / -size +10M -exec ls -l {} ;

It finds all files using ls -l and hands them off to the find command to display.

It finds all files older than 10 minutes and long lists them using the ls command

It finds all files larger than 10 MB and long lists them using the ls command.

It uses the ls command to find all files in the filesystem matching the {} wildcard.

20 / 60

Assume the variable myNumber holds a string consisting of 10 digits. What will this command output?

echo \$myNumber | sed -e 's/^[[:digit:]][[:digit:]][[:digit:]]/(&)/g'

It will only match digits—and since the string has only digits, the command will output the same number without changes.

It will output the same 10-digit number, but every digit will be inside parentheses.

It will output the entire 10-digit number inside parentheses.

It will output the same 10-digit number, but the first 3 digits will be inside parentheses.

21 / 60

Which of the following commands can be used to determine the time of the last login of a given user?

Showlog

Recent

Last

History

22 / 60

When configuring a Samba share, how would the engineering group be specified in the smb.conf?

Samba uses Linux operating system groups from the /etc/group file; just specify the group name.

It would be preceded by a percent sign (%), such as %engineers.

Use the group name by itself; Samba checks for its existence.

It would be preceded by an @ symbol, such as @engineering.

23 / 60

What command would you use to resize an LVM volume group to include an additional physical volume?

vgadd

vgresize

vgappend

vgextend

24 / 60

Which command in Bash executes the last line in the shell history that starts with ls?

!ls

25 / 60

What is one major difference between brace expansion and globs?

Globs create a list; brace expansion matches pattern.

Brace expansion requires files to exist; globs do not.

Brace expansion creates a list; globs match the list of pathnames.

Globs get processes first and brace expansion later.

26 / 60

Why might would you use the usermod command ?

to log out a user

to lock a user's account

to change global user account settings

to set a user's password

27 / 60

You want to resolve a long list of DNS names using dig. What should you do?

Create a text file including all names and use the -f option of dig.

Type in each query manually.

Write a shell script to send multiple dig queries to the DNS server.

Save the DNS names in an SQL database and process it with dig.

28 / 60

What is the job of the NetworkManager daemon?

It is a graphical tool that manages network connections, including bonding and wireless networks.

It is a security service that manages user access control of local network-aware services.

It attempts to keep an active network connection available at all times.

It is a command-line tool that manages network connections.

29 / 60

Which network interface always exists in a Linux system?

Sit0

Wlan0

Vlan0

Eth0

30 / 60

Which of the following commands can be used to extract files from an archive?

Tar -vf

Tar -xvf

Tar -evf

Tar -e

Tar -v

31 / 60

To search from the current cursor position up to the beginning of the file using VIM, type __ and then the search criteria.

/search

32 / 60

Which of the following will change the group that is associated with a file?

Chmod

Chmod -w

Chown

Ls -g

33 / 60

To mount a drive-by its ID, what command would you use first to retrieve it?

df -h

listid

ls -l

blkid

34 / 60

What is the preferred source for the installation of new applications?

The vendor's version management system

A CD-ROM disk

The distribution's package repository

The vendor's website

A retail store

35 / 60

Which command displays the list of groups to which a user belongs?

Whoami

Isgroup

Who

36 / 60

Which of the following directories is often used to store log files?

/home

/var

/temp

/dev

/usr

37 / 60

When archiving files, which command will preserve all file attributes including ACLs and SELinux security context?

zip

tar

Linux MCQ: Linux Multiple Choice Questions and Answers

Guideline of Linux MCQ:

You have 1 hours to take the Linux MCQs

Your time has been Over.

What character class is equal to this set?

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