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DevOps Version Control System Git Interview Question and Answers | DevOps Training

Before starting with DevOps Version Control System interview question and answers, let us discuss few points about "Version Control Systems". In this blog you will learn following topics

 1. What is Version Control System 

 2. Types of Version Control System 

 3. Interview questions on Version Control System and tools 

DevOps Version Control System interview question and answers blog is a part of DevOps Interview questions and answers parent blog series.

What is Version Control System: 

Version control system(VCS) is a collection of applications used to track the changes made in a set of files. Version control systems are designed to handle necessary steps in development process with speed and efficiency. 

Types of Version Control Systems:  

Version control systems are divided into two types, they are as follows

  i. Centralized Version Control System

  ii. Distributed Version Control System 

Centralized Version Control System: 

Centralized VCS is uses a single repository or central server for storing files and enables team members to collaborate and access necessary required files. 

Distributed Version Control System: 

Distributed VCS is different from Centralized VCS and it enables teams to have a working of main repository rather than using single repository. 

Major DevOps Version Control System tools are as follows

     1. Git

     2. Subversion

     3. CVS 

The above tools all comes under Open Source DevOps version control system tools category 

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DevOps Interview questions on Git:

1. What is Git?

Git is an Open Source DevOps version control system tool or Distributed Version Control System(DVCS) that supports distributed non-linear development. Because of its distributed storage strategy, team members can easily find and access Git repositories.

2. What are the features of Git?

  i. Very flexible and compatible for working systems

 ii. Free and Open Source in nature

 iii. Faster completion of tasks

 iv. Highly scalable

 v. Easy branching

 vi. Provides reliability and high security

3. What is the use of Git in DevOps?

DevOps is designed to enhance the software life cycle development process and operations to provide continuous software delivery and improve profits to the business developments. DevOps creates a collaboration environment between Software developers and testing operation professionals for speed up the development and rectifying or fixing the errors parallelly with development. 

 When DevOps teams working in big projects there is huge need of maintaining collaborative communication between teams without any interruption disturbances. Git provides stable communication message services between developers and testing teams while making changes in any repository files so team members can have clear observance on changes made by the other team members.

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4. What is the difference between Git and subversion?

                                  Git  

                           Subversion 

1. It is a Distributed Version Control System(DVCS) 

1. It is a Centralized Version Control System(CVCS) 

2. Teams can have own local copy of main repository 

2. Teams have only central repository 

3. Can easily make changes in local copies and push those changes into other repositories.  

3. First we need check-in into CVCS and synchronize and changes list and then send changes to CVCS 

4. We can easily push changes into local repositories  

4. All users have to use and share same repository   

5. Users can easily collaborate on new features without effecting central repository  

5. If users want to share code, first check-in and sync central repository  

5. What is the difference between git pull and git fetch?

Git pull: This command pulls newly made changes from a particular branch from central repository and updates target branch in local repositories. 

Git fetch: This is similar like git pull command but difference is, it pulls new changes from a desired branch and updates or stores it into new branches in local repositories. 

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6. What is "Bare Repository" in Git?

Bare repository doesn't store any files instead it maintains all the version control information. It useful for remote servers to push multiple team members to push their work into working repositories.  

7. What command we use to write a commit message in Git?

"git commit –a" is the command uses to write commit message in Git. -a flag stands for "all" and describes git command to commit or track files that have been modified and deleted, but new files you have not told Git about are not affected.

8. What is Git stash?

Git stash command used to record the present state of the working directories and their index. Stash command stores local changes away and reverts working directory to match HEAD commit. 

Git Stash list: This command lists all the stashed or hidden modifications. 

Git stash show: Uses to inspect stashed modifications. 

Git stash apply: Uses to restore stashed modifications.

9. What is Git stash drop?

Git stash drop command used to remove hidden or stash item from the stash list. By default it removes lastly stashed item in the list and need to specify if we want to remove particular item. 

Ex: git drop stash@{o}: Drop out zeroth item from the stash list. 

      git drop stash@{1}: Drop out first item  from the stash list. 

       git drop stash@{n}: Drop out n'th item  from the stash list.

10. How can you create a repository in Git?

“git init” command uses to create a storage repository in Git. Create a directory for the project in order to create a repository in Git. Make sure newly creating directory name does not match any other existing directories.  

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