🐧 Top 100 Linux Multiple Choice Questions & Answers
📘 For Freshers & Experienced Professionals
🔹 Linux Objective Type Questions and Answers
🔹 Useful for Interviews, Exams & Practice
🟢 What is the Linux mascot?
🅰️ Hat
🅱️ Gecko
🅲️ Elephant
🅳️ Penguin
✅ Ans: 🅳️ Penguin
⚙️ How do you show all processes being run by a particular user?
🅰️ cat /home/USERNAME/open.process
🅱️ top –USERNAME
🅲️ cat /etc/activeprocess | grep USERNAME
🅳️ netstat -u USERNAME
🅴️ top -U [USERNAME]
✅ Ans: 🅴️ top -U [USERNAME]
🚀 What does GRUB stand for?
🅰️ Grand Unified Bootloader
🅱️ Grand Unification Bootloader
🅲️ Great Unique Bootloader
🅳️ Gum Removal Under Boot
🅴️ Great Ultimate Bootloader
✅ Ans: 🅰️ Grand Unified Bootloader
💾 Mount -a will load all filesystems listed in:
🅰️ /etc/mtab
🅱️ /etc/filesystems
🅲️ /etc/fstab
🅳️ /etc/fs.conf
✅ Ans: 🅲️ /etc/fstab
🖥️ What is GNOME?
🅰️ Network protocol for GUI
🅱️ Desktop environment & GUI
🅲️ Linux distribution
✅ Ans: 🅱️ Desktop environment & GUI
📦 Ubuntu is based on…
🅰️ Fedora
🅱️ Slackware
🅲️ Debian
🅳️ Gentoo
✅ Ans: 🅲️ Debian
🛠️ How do you activate the noclobber shell option?
🅰️ noclobber
🅱️ set -o noclobber
🅲️ #NAME?
✅ Ans: 🅱️ set -o noclobber
👨💻 The Linux Kernel was written by?
🅰️ Brian Kernighan
🅱️ Dennis Ritchie
🅲️ Richard Stallman
🅳️ Linus Torvalds
✅ Ans: 🅳️ Linus Torvalds
📂 Which directory contains all files needed to boot Linux?
🅰️ /dev
🅱️ /boot
🅲️ /bin
✅ Ans: 🅱️ /boot
🧹 The rm command is used to:
🅰️ Remove kernel module
🅱️ Run macro
🅲️ Mount remote FS
🅳️ Delete a file
✅ Ans: 🅳️ Delete a file
🔐 What is the SSH command used for?
🅰️ Restricted shell
🅱️ Synchronous shell
🅲️ Secure local shell
🅳️ Secure remote connection
✅ Ans: 🅳️ Secure remote connection
📍 What does pwd command do?
🅰️ Saves directory
🅱️ Changes password
🅲️ Prints current directory path
🅳️ Starts power daemon
✅ Ans: 🅲️ Prints current directory path
🧠 What does ‘Z’ mean in ps command status?
🅰️ Sleeping process
🅱️ High priority
🅲️ Zombie process
🅳️ Low priority
✅ Ans: 🅲️ Zombie process
🌐 The netstat command gives information about:
🅰️ Active sockets
🅱️ Open sockets
🅲️ Routing tables
🅳️ All of these
✅ Ans: 🅳️ All of these
🔁 To repeat the last command in bash shell:
🅰️ !!
🅱️ $HISTFILE
🅲️ !6
✅ Ans: 🅰️ !!
📖 How do you view documentation for the kill command?
🅰️ kill -help
🅱️ doc kill
🅲️ man kill
✅ Ans: 🅲️ man kill
💽 What is Swap?
🅰️ Virtual memory on disk
🅱️ HDD cache
🅲️ RAM cache
🅳️ User switch
✅ Ans: 🅰️ Virtual memory on disk
🧾 Which command lists open files?
🅰️ lof
🅱️ lsof
🅲️ openf
✅ Ans: 🅱️ lsof
📡 What does ping do?
🅰️ Sends ICMP packets
🅱️ Sends TCP packets
🅲️ Tests sound
🅳️ Checks routing
✅ Ans: 🅰️ Sends ICMP packets
🔒 By default encrypted passwords are stored in:
🅰️ /etc/passwd
🅱️ /etc/password
🅲️ /etc/shadow
🅳️ /etc/user
✅ Ans: 🅲️ /etc/shadow
🎯 What is the UID of root?
🅰️ -1
🅱️ 0
🅲️ 1000
🅳️ 1
✅ Ans: 🅱️ 0
✨ Why this Linux MCQ list is useful?
✔️ Interview preparation
✔️ Linux certification exams
✔️ Freshers & experienced users
✔️ Real-time practical knowledge
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