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As tech interviews get more and more competitive, it’s a good idea to be aware of the type of Linux interview questions you can be asked at the interview. Linux, as you may know, is an open-source, freely distributable operating system similar to Unix. This article covers some of the most commonly asked Linux interview questions.
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This article will cover:
1. Define symbolic links.
Symbolic links redirect to another file somewhere in the file system, but the target file does not store any data. So if the target file is deleted, the link to that file is removed, but not the file.
2. What are the basic components of Linux?
The basic components of Linux are Kernel, Shell, GUI, System Utilities, and Application Programs.
1. How many types of Shells are there in Linux?
There are five types of Shells in Linux: C Shell or csh, Korn Shell or ksh, Z Shell or Zsh, Bourne Again Shell or bash, and Friendly Interactive Shell or Fish.
2. What are Daemons?
Background processes that accept requests for service from other computers are called Daemons.
Here are some sample interview questions to help you with your preparation:
1. What are the advantages and disadvantages of open source?
An advantage of open source technologies is that programmers can add new software that is freely available to users to download and edit the code as needed. It provides choices and flexibility to the users.
The disadvantages of open source are that it can be comparatively more difficult to use, have compatibility issues, there may be some hidden costs and other issues related to liabilities and warranties.
2. What is BASH?
Bourne Again Shell, or BASH, is a command language interpreter written by Brian Fox. It is similar to Bourne Shell and can be used in place of it. BASH, however, includes some additional features and serves as the default user shell on many Linux installations. It can run in the terminal window and can also read commands from shell scripts.
3. Differentiate between UNIX and LINUX?
Unix was created as a proprietary operating system, which now has several commercial versions. On the other hand, Linux is a free, open-source, and non-proprietary OS.
4. What is Kernel?
Kernel, also known as low-level system software, is the first program that loads when a computer starts. It is the main component of Linux that serves as a resource managing link between hardware and software. It mainly manages hardware resources for users and provides an interface for user-level interaction.
5. What is swap space?
A space on a hard disk that is used when the RAM is full is called swap space and is seen as a substitute for physical memory or an extension of RAM. It mainly substitutes disk space for RAM when the real RAM doesn’t have sufficient space to hold all the programs running, and more space is required.
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