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Linux Operating System MCQsIn this article, we will discuss the Linux Operating System MCQs. But before starting MCQs, we must know about the Linux OS and its features. In 1991, Linus Torvalds developed the open-source operating system Linux, which is comparable to UNIX OS. It is built upon the Linux kernel, which serves as the computer's brain. From servers and mainframes to desktop and laptop computers and even embedded systems like smartphones and smart TVs, Linux is widely utilized in several computing devices. Some key features of Linux:There are several key features of the Linux Operating System. Some Linux OS features are as follows:
Multiple choice questions:1) Which of the following statements regarding Linux is accurate?
Answer: b) The operating system is based on Unix. Explanation: The correct answer is (b). The Linux open-source operating system is based on the UNIX platform. Since its inception, it has received widespread adoption for use on a range of platforms, including servers, desktop computers, and embedded systems. It was developed by Linus Torvalds. 2) Which of the following is not a Linux distribution?
Answer: c) Windows Explanation: The correct answer is c) Windows. Linux distributions do not include Windows. Microsoft designed a special operating system for it. The well-known Linux distributions are Ubuntu, CentOS, and Fedora. 3) Which shell is mostly utilized in Linux distributions by default?
Answer: a) Bash Explanation: The correct answer is a) Bash. The default shell for most of the Linux distributions is Bash (Bourne Again SHell). It is a well-known command-line interpreter with features including command history, tab completion, and scripting abilities. 4) Which command is used to display the current working directory in Linux?
Answer: a) pwd Explanation: The correct answer is a) pwd. The current working directory in Linux can be viewed by using the pwd (Print Working Directory) command. The current directory you are in's absolute path is displayed. 5) Which command is used in Linux to create a new directory?
Answer: c) mkdir Explanation: The correct answer is c) mkdir. Linux users can create new directories using the mkdir (Make Directory) command. The working directory receives the directory name as an argument, creating a copy of that directory. 6) Which command does Linux use to copy files and directories?
Answer: b) cp Explanation: The correct answer is b) cp. Linux users can copy files and directories with the cp (Copy) command. It generates a copy of the source in the given destination and accepts the source file or directory and destination as arguments. 7) Which command should you use in Linux to remove a file?
Answer: c) rm Explanation: The correct answer is c) rm. With the rm (Remove) command, you can remove a file from Linux. In the file system, it permanently removes the selected file. 8) Which command should you use in Linux to change file permissions?
Answer: b) chmod Explanation: The correct answer is chmod. In Linux, file permissions are changed using the chmod (Change Mode) command. On a file or directory, you can change the read, write, and execute rights for the owner, group, and other users. 9) Which file stores the system configuration settings in Linux?
Answer: d) /etc/sysconfig Explanation: The correct answer is d) /etc/sysconfig. The /etc/sysconfig directory is home to a large number of system configuration files for Linux. It is employed to save configurations for hardware, startup scripts, networks, and more. 10) Which command should use in Linux to search for a certain text pattern in files?
Answer: a) grep Explanation: In this case, the correct answer is a) grep. Use the grep (Global Regular Expression Print) command to search for a certain text pattern in files under Linux. When patterns are found, regular expressions can be utilized to highlight any matching lines. 11) Which Linux command is used to compress files?
Answer: a) tar Explanation: The correct answer is tar. Linux users can use the tar (Tape Archive) command to create compressed archive files. It can be used in conjunction with tools for file compression like gzip or bzip2 to reduce file sizes as you create the archive. 12) Which command should be used to display a file's contents in Linux?
Answer: a) cat Explanation: The correct answer is a) cat. You can see what's within a file by utilizing the cat (Concatenate) command in Linux. It can be used to combine numerous files into one or display the contents of a single file. 13) Which command can be used to find the IP address of a Linux system?
Answer: a) ifconfig Explanation: The correct answer is a) ifconfig. The ifconfig (Interface Configuration) tool can be used to learn the IP address of a Linux system. It shows details about the system's network interfaces' settings, including their IP addresses. 14) Which command is used to manage processes in Linux Systems?
Answer: d) All of the above Explanation: The correct answer is d) All of the above. Active processes can be dynamically viewed using the top command, information about them can be viewed using the ps command, and they can be terminated using the kill command. All of these commands can be used to manage processes in Linux. 15) Which command is used in Linux to schedule operations to perform at particular times?
Answer: a) cron Explanation: The correct answer is a) cron. In Linux, jobs can be scheduled to run at particular times using the cron command. By defining the timetable and the executed command, it enables you to automate repeated operations. 16) Which command is used to view the system log files in Linux?
Answer: d) tail Explanation: The correct answer is d) tail. In Linux, the system log files are viewed with the tail command. By default, it shows the last 10 lines of a file, but you can use settings to change how many lines are shown. 17) Which command is used to check the disk utilization in Linux?
Answer: a) df Explanation: The correct answer is a) df. Linux users can examine the disk utilization by using the df (Disk Free) command. Both the remaining space on file systems and how much disk space has been used are shown. 18) Which command in Linux is used to check network connectivity?
Answer: c) ping Explanation: The correct answer is c) ping. In Linux, network connectivity is tracked using the ping command. It assists in figuring out whether a host can be reached via the network by sending ICMP echo queries to a certain host and tracking the round-trip time for the responses. 19) Which command is used the majority of the time to install software packages in Linux distributions?
Answer: c) apt-get Explanation: The correct answer is c) apt-get. Most Debian-based Linux systems, including Ubuntu, use the apt-get tool to install software packages. It is a utility for managing packages that take care of upgrades, uninstallation, and installation. 20) Which command is utilized to restart or shut down a Linux system?
Answer: d) All of the above Explanation: The correct answer is d) All of the above. The shutdown command can be used to shut down the system safely, the poweroff command to promptly turn it off, and the reboot command to start it back up. These commands are all used to restart or shut down a Linux machine. 21) Which command is used to archive and compress files in Linux?
Answer: d) All of the above Explanation: The correct answer is d) All of the above. The gzip command is used to compress individual files, the zip command is used to build compressed zip files, and the tar command to create archive files. In Linux, these commands are all used for file archiving and compression. 22) Which Linux command is used to view the running processes?
Answer: c) ps Explanation: The correct answer is c) ps. Linux users can view all currently active processes by using the ps (Process Status) command. It shows details about running processes, such as their process IDs (PIDs), resource use, and other information. 23) In Linux, which command is used to change the current user?
Answer: a) su Explanation: The correct answer is a) su. Linux's su (Switch User) command can be used to modify the current user. By inputting its password, you can change to a different user account. 24) Which command is used to create a new user in Linux?
Answer: c) createuser Explanation: The correct answer is c) createuser. The createuser command is used to create a new user in Linux. To configure the user's password and other settings, further commands, such passwd, are often sent after it. 25) Which command is used to change a file's owner in Linux?
Answer: a) chown Explanation: The correct answer is a) chown. The Linux chown (Change Owner) command can be used to change a file's owner. Using this command, you can designate a new owner for a file or directory. 26) Which command is used to view and manipulate environment variables in Linux?
Answer: d) All of the above Explanation: The correct answer is d) All of the above. Environment variables can be set or modified within a shell session using the set command, and they can also be made available to child processes using the export command. The env command can be used to view the current environment variables. 27) In Linux, which command is used to create a symbolic link?
Answer: a) ln Explanation: The correct answer is a) ln. Linux users can build symbolic links by using the ln (Link) command. Special files called symbolic links can point to another file or directory. 28) Describe Linux.
Answer: b) An operating system Explanation: Linux is an open-source operating system that is frequently used in a wide range of gadgets, including servers, desktop computers, mobile phones, and embedded systems. It is well known for its dependability, security, and flexibility. 29) What exactly is Linux's root directory?
Answer: a) The directory where system files are stored Explanation: The top-level directory of the file system hierarchy in Linux is known as the root directory. A forward slash ("/") serves to identify it. System files, configuration files, and directories that are necessary for the operating system to function can be found in the root directory. It is distinct from the superuser's normal "/root" home directory. 30) Which of the following best describes Linux?
Answer: c) Open-source nature Explanation: Linux is well known for being open-source, which implies that users are free to examine, edit, and share the operating system's source code. This openness encourages teamwork, creativity, and individualization. 31) What does the Linux "man" command accomplish?
Answer: a) Display manual pages Explanation: Using the "man" command in Linux, you may view the documentation for additional commands, utilities, and system features. It offers comprehensive details on command usage, choices, and examples. 32) What does the Linux "tar" command accomplish?
Answer: b) List directory contents Explanation: In Linux, the "tar" command is generally employed to produce compressed archives, sometimes known as tarballs. It also provides the ability to extract files from archives. The "ls" command is normally used to list directory contents; listing directory contents is not the main function of the "tar" command. 33) What is the purpose of the Linux command "chmod 755 file.txt"?
Answer: d) Changes the permissions of file.txt to read, write, and execute for the owner and read and execute for others Explanation: The "chmod" command can be used in Linux to modify a file's or directory's permissions. In this case, "file.txt" is given read, write, and execute permissions for the owner, and the "chmod 755 file.txt" command gives read and execute permissions for others. 34) Which of the following is a part of the Linux operating system's kernel?
Answer: d) Linux kernel Explanation: The Linux Kernel, the central element of the Linux operating system, is responsible for overseeing hardware resources and offering critical services to programs. 35) In Linux, file permissions are represented by:
Answer: d) Octal numbers Explanation: In Linux, file permissions are represented by three octal digits. 36) Which command is employed to end a running process in Linux?
Answer: b) kill Explanation: The 'kill' command in Linux can be used to terminate an active process. 37) What Linux runlevel is used to shut down the system?
Answer: c) 0 Explanation: The shutdown of the operating system in Linux is accomplished using runlevel 0. 38) In Linux, the 'ps' command is used to:
Answer: b) Print the process table Explanation: The 'ps' command is used to provide information about the processes that are running on the system right now. 39) In Linux, the "whoami" command is used to:
Answer: d) Display the current username Explanation: The command "whoami" displays the user's username, who is presently logged in. 40) Which command is used to edit a text file in Linux?
Answer: a) vim Explanation: In Linux, a well-liked text editor called "vim" is used to edit text files. 41) Which command is used in Linux to display the current time and date?
Answer: d) date Explanation: In Linux, the date and time are displayed using the 'date' command. 42) Linux automatically assigns the following accounts to the first user established during installation:
Answer: c) Root account Explanation: During installation, the root account-also known as superuser. It is automatically given to the first user created. 43) Which command is used to display a zipped file's contents without first decompressing it?
Answer: a) zcat Explanation: The 'zcat' command is used to show a compressed file's contents without first decompressing it. 44) In Linux, the 'who' command is used to:
Answer: b) Display presently logged-in users Explanation: The 'who' command in Linux is used to display details about people who are currently logged in. 45) Which command is used to build a symbolic link in Linux?
Answer: d) ln -s Explanation: In Linux, a symbolic link (symlink) is made with the 'ln -s' command. 46) The 'cron' system in Linux is utilized for:
Answer: d) Scheduling recurring tasks Explanation: The 'cron' system in Linux is used to schedule repeating tasks or jobs. 47) Which command in Linux should be used to view and change the system date and time?
Answer: a) timedatectl Explanation: The 'timedatectl' is a command that allows Linux users to view and modify the system time and date. 48) In Linux, the 'ls -l' command displays:
Answer: b) A long format listing containing comprehensive information Explanation: The 'ls -l' command in Linux provides a long format listing that includes comprehensive information about files and folders. 49) In Linux, the 'uptime' command displays:
Answer: c) The average uptime and load Explanation: In Linux, the 'uptime' command shows the average load and uptime for the system. 50) Which command in Linux is used to observe and manage background processes?
Answer: a) jobs Explanation: The 'jobs' command in Linux is used to examine and control background processes.
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