Interview Questions.

Question 1. What Is Jenkins?

Answer :

Jenkins is an open source non-stop integration tool written in Java. It continues a tune on model manipulate device and to initiate and monitor a build machine if changes arise.

Question 2. What Is The Difference Between Maven, Ant And Jenkins?

Answer :

The maximum basic difference is:

Maven and Ant are Build Technologies whereas Jenkins is a continuous integration device.

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Question three. Which Scm Tools Does Jenkins Support?

Answer :

Jenkins supports the following SCM equipment:

AccuRev
CVS
Subversion
Git
Mercurial
Perforce
Clearcase
RTC
Question four. What Is Continuous Integration In Jenkins?

Answer :

In software program improvement, multiple developers or teams work on specific segments of identical internet utility so that you need to carry out integration take a look at with the aid of integrating all modules. In order to do that an automatic technique for every piece of code is completed on every day bases so that every one your codes get examined. This technique is referred to as non-stop integration.

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Question five. What Is The Relation Between Hudson And Jenkins?

Answer :

Hudson turned into the sooner name and model of modern-day Jenkins. After a few difficulty, the task call changed into modified from Hudson to Jenkins.

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Question 6. What Is The Requirement For Using Jenkins?

Answer :

For the use of Jenkins, you have to want a supply code repository which is on the market. For instance, a Git repository and a operating construct script, e.G., a Maven script, checked into the repository.

Question 7. What Are The Advantages Of Jenkins?

Answer :

Advantage of Jenkins includes:

Bugs monitoring are smooth at early degree in development surroundings.
Provides a big numbers of plugin aid.
Iterative improvement to the code.
Build screw ups are cached at integration level.
For every code commit changes an automated build record notification generates.
To notify builders approximately build document fulfillment or failure, it's miles included with LDAP mail server.
Achieves non-stop integration agile improvement and check pushed improvement.
With simple steps, maven launch assignment is computerized.
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Question 8. How To Make Sure That Your Project Builds Doesn’t Break In Jenkins?

Answer :

You have to comply with those steps to ensure that your undertaking builds doesn’t smash in Jenkins:

First, perform a hit clean set up in your nearby system with all unit tests.
Check all your code modifications.
Synchronize with repository to make certain that every one required config and POM changes and any difference is checked into the repository.
Question 9. How Can You Move Or Copy Jenkins From One Server To Another?

Answer :

Follow those steps to transport or reproduction Jenkins from one server to some other:

First, copy the related job listing and slide a process from one installation of Jenkins to some other.
Make a replica of an already existing task by means of making clone of a task directory via a specific call.
Renaming an current job through rename a listing.
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Question 10. Which Commands Can Be Used To Start Jenkins Manually?

Answer :

You can use anybody of the following commands to start Jenkins manually:

(Jenkins_url)/restart: Forces a restart with out waiting for builds to complete.

(Jenkin_url)/safeRestart: Allows all running builds to complete.

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Question eleven. What Are The Most Useful Plugins In Jenkins?

Answer :

Some most useful plugins in Jenkins:

Maven 2 project
Amazon EC2
HTML publisher
Copy artifact
Join
Green Balls
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Question 12. How To Create A Backup And Copy Files In Jenkins?

Answer :

If you need to create a lower back-up of your Jenkins setup, just replica the listing that saves all of the setting, build artifacts and logs of Jenkins in its domestic directory. You also can copy a task listing to clone or reflect a activity or rename the listing.

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Question 13. How You Can Clone A Git Repository Via Jenkins?

Answer :

To clone a Git repository via Jenkins, you need to input the e-mail and consumer call in your Jenkins device. For that, you have to transfer into your process directory and execute the “git config” command.

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Question 14. How You Can Set Up Jenkins Job?

Answer :

To create a challenge that is treated thru jobs in Jenkins. Select New item from the menu, once this carried out enter a name for the job and choose free-fashion process. Then click on OK to create new activity in Jenkins. The subsequent web page enables you to configure your job.

Question 15. What Are The Two Components Jenkins Is Mainly Integrated With?

Answer :

Jenkins is included with these two components:

Version Control system like GIT,SVN
And construct gear like Apache Maven.
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Question 16. What You Do To Make Sure That Your Project Build Doesn’t Break In Jenkins?

Answer :

I make certain that I carry out successful smooth installation on my neighborhood device with all unit tests.

Then I ensure that I take a look at in all code modifications.

Then I do a Synchronize with repository to ensure that every one required config and POM modifications and any distinction is checked into the repository.

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Question 17. What You Do When You See A Broken Build For Your Project In Jenkins?

Answer :

I will open the console output for the build and could try to see if any document modifications had been missed.

If no longer able to locate the problem that manner, Will smooth and replace my neighborhood workspace to copy the problem on my neighborhood and could attempt to solve it.

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Question 18. How Can Create A Backup And Copy Files In Jenkins?

Answer :

Jenkins saves all the setting, construct artifacts and logs in its domestic listing, to create a returned-up of your Jenkins setup, just replica this listing. You also can copy a activity listing to clone or reflect a job or rename the listing.

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Question 19. How Can You Clone A Git Repository Via Jenkins?

Answer :

If you want to clone a Git repository through Jenkins, you have to input the e-mail and person call to your Jenkins system. Switch into your activity directory and execute the “git config” command for that.

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Question 20. How Can You Setup Jenkins Jobs?

Answer :

Follow those steps:

Select new object from the menu.
After that input a name for the activity and pick out unfastened-fashion activity.
Then click OK to create new task in Jenkins.
The subsequent page allows you to configure your process.
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Question 21. Tell Me Jenkins Installation Requirements?

Answer :

Jenkins requires Java7 or above and Servlet 3.1 to feature.
Java8 is suggested.
Jenkins calls for a truthful amount of memory to perform well.
Smaller installations need to start round 256MB1GB.
Question 22. Define Few Plugins Of Jenkins?

Answer :

Here are some plugins that may be used with Jenkins:

Delivery Pipeline
Join Plugin
Copy Artifact
Git
Android Emulator
Cobertura
Email-ext
Docker
Amazon EC2
Openstack Cloud
CloudBees Folders