Question 1:

Which of the following commands is used to display the current working directory in Linux?
A. pwd
B. ls
C. cd
D. dir
Correct Answer: A. pwd
Explanation: The pwd command (print working directory) displays the full path of the current working directory.

Question 2:

Which of the following is the default package manager for Debian-based Linux distributions (e.g., Ubuntu)?
A. rpm
B. dpkg
C. apt
D. yum
Correct Answer: C. apt
Explanation: The apt package manager is used to install, update, and remove packages in Debian-based distributions like Ubuntu.

Question 3:

Which command is used to view running processes on a Linux system?
A. ps
B. kill
C. top
D. shutdown
Correct Answer: C. top
Explanation: The top command displays an interactive list of processes running on the system, including their resource usage.

Question 4:

Which directory contains system configuration files in Linux?
A. /home
B. /etc
C. /usr
D. /var
Correct Answer: B. /etc
Explanation: The /etc directory contains system-wide configuration files and system administration scripts.

Question 5:

Which of the following commands is used to change the owner of a file in Linux?
A. chown
B. chmod
C. chgrp
D. chmod
Correct Answer: A. chown
Explanation: The chown command is used to change the owner (and group) of a file or directory.

Question 6:

Which file is used to configure user account information in Linux?
A. /etc/passwd
B. /etc/sudoers
C. /etc/group
D. /etc/shadow
Correct Answer: A. /etc/passwd
Explanation: The /etc/passwd file stores basic information about user accounts, including usernames and home directories.

Question 7:

Which of the following commands is used to search for files on a Linux system?
A. ls
B. find
C. grep
D. locate
Correct Answer: B. find
Explanation: The find command is used to search for files and directories based on various criteria such as name, size, or modification date.

Question 8:

What is the default runlevel for a Linux system that uses SysVinit?
A. 0
B. 3
C. 5
D. 6
Correct Answer: C. 5
Explanation: Runlevel 5 is used for multi-user mode with graphical user interface (GUI), which is the default for most Linux systems using SysVinit.

Question 9:

Which command can be used to display disk usage in a human-readable format?
A. df -h
B. du -h
C. lsblk
D. top
Correct Answer: A. df -h
Explanation: The df -h command shows disk space usage in a human-readable format (e.g., in GB or MB).

Question 10:

Which of the following is a privileged user in Linux that can perform administrative tasks?
A. user
B. admin
C. root
D. sudo
Correct Answer: C. root
Explanation: The root user is the system’s administrator with full access to all files and commands.

Question 11:

Which file contains information about group memberships for users?
A. /etc/passwd
B. /etc/group
C. /etc/shadow
D. /etc/sudoers
Correct Answer: B. /etc/group
Explanation: The /etc/group file contains information about user groups and their members.

Question 12:

Which of the following is used to view and manage disk partitions in Linux?
A. fdisk
B. mkfs
C. mount
D. format
Correct Answer: A. fdisk
Explanation: The fdisk command is used to view and manage disk partitions on Linux systems.

Question 13:

What does the chmod 755 command do?
A. Grants read and write permissions to the owner, and read-only permissions to others
B. Grants full permissions to everyone
C. Grants execute permissions to everyone
D. Grants full permissions to the owner, and read and execute permissions to others
Correct Answer: D. Grants full permissions to the owner, and read and execute permissions to others
Explanation: chmod 755 sets read, write, and execute permissions for the owner, and read and execute permissions for the group and others.

Question 14:

Which of the following is used to start, stop, or restart services in a system that uses systemd?
A. service
B. systemctl
C. chkconfig
D. initctl
Correct Answer: B. systemctl
Explanation: The systemctl command is used to manage services in systems using systemd.

Question 15:

Which of the following file systems is commonly used for Linux installations?
A. NTFS
B. ext4
C. FAT32
D. HFS+
Correct Answer: B. ext4
Explanation: The ext4 file system is the most commonly used file system for Linux installations due to its reliability and performance.

Question 16:

Which command is used to view kernel version information in Linux?
A. uname -a
B. kernel -v
C. lscpu
D. osinfo
Correct Answer: A. uname -a
Explanation: The uname -a command displays detailed information about the Linux kernel, including its version.

Question 17:

Which of the following is a log file that stores system messages and events?
A. /var/log/syslog
B. /etc/passwd
C. /home/user/.bashrc
D. /usr/local/bin
Correct Answer: A. /var/log/syslog
Explanation: The /var/log/syslog file contains general system logs, including messages from various services.

Question 18:

Which command is used to suspend a running process in Linux?
A. bg
B. fg
C. stop
D. ctrl+z
Correct Answer: D. ctrl+z
Explanation: Pressing Ctrl+Z suspends a running process and places it into the background.

Question 19:

Which of the following is the default Linux shell?
A. zsh
B. bash
C. csh
D. fish
Correct Answer: B. bash
Explanation: The bash shell (Bourne Again Shell) is the default shell on most Linux distributions.

Question 20:

Which of the following commands is used to update a package database in a Debian-based Linux system?
A. apt-get update
B. yum update
C. dnf update
D. pacman -Syu
Correct Answer: A. apt-get update
Explanation: The apt-get update command updates the package database, allowing the system to know the latest available package versions.