Introduction

Jenkins interview questions help understand Jenkins, which helps testers and developers create robust software used in continuous integration and scalable building applications. The lifecycle of software involves developers creating an entire module which then goes for sanity and testing checks. However, during the development cycle, the testers are typically free and vice versa in the test cycle when the developers are free.

Testers must detect problems at the earliest. Jenkins uses automation of the build, deploy, test and analyse processes while allowing testers and developers to use Java code and continuous integration where multiple codes are jointly submitted and changes integrated into the project.

Jenkins suite thus has a lot of advantages in software development leading to smoother tested processes in the shortest of times by using the several plugins available.  If such a plugin is not readily available, one can code a new plugin and share it on the community platform for further tweaking. Jenkins interview questions revolve around Jenkins being easy to configure, set up and install and helping with continuous delivery and continuous process integration. As it is open-source software, it scores with its several thousand plugins and works across platforms using Java for its coding.

List of interview questions

As with the interviewer, Jenkins interview questions normally start with basic questions about its advantages, installation, etc. Once through this set, the level of difficulty in answering Git interview questions, Maven interview questions and answers, Jenkins advanced interview questions etc., are increased to match the interviewee’s knowledge on Maven interview questions for experienced interview questions on Git and Jenkins, Jenkins, pipeline interview questions and more. Always answer the Jenkins interview questions and answers crisply and to the point. Here’s our list of Jenkins interview questions to help one prepare for the interview.

  • What are Jenkin and its best features?
  • Why use Jenkins?
  • How did it come into use?
  • How does Jenkins achieve continuous integration?
  • Name some continuous integration tools, and why is Jenkins better than them?
  • Explain DevOps and how Jenkins is used in it.
  • List Jenkins installation system requirements.
  • Explain the installation of Jenkins.
  • Name the Jenkins suite’s important plugins.
  • Explain what Groovy means.
  • Explain Jenkins’ working in a simple use-case.
  • How does one start using Jenkins from the command line?
  • Explain SCM tools supported by Jenkins.
  • What is meant by a job when using Jenkins?
  • Explain how to create a job.
  • Explain the Jenkins pipeline.
  • Name the pipeline types in Jenkins.
  • If using SVN polling or scheduling a building job in Jenkins, what syntax is used?
  • Explain how to build a Jenkins job.
  • Explain user authentication in Jenkins.
  • How is a third-party tool used in Jenkins?
  • What are the differences between Bamboo and Jenkins?
  • Explain the process used by Jenkins.
  • Why use Jenkins?
  • How does one copy files and create a backup in Jenkins?
  • What is DSL Jenkins?
  • How does one use Jenkins to create a Multibranch Pipeline?
  • What is meant by the blue ocean when using Jenkins?
  • What is the process of continuous testing?
  • How does one integrate the Jenkins process with Git?
  • Create and explain the workflow in a Continuous Delivery Workflow.
  • Bring out the differences in Continuous Deployment, Continuous Delivery and Continuous Integration?
  • Explain the code for a pipeline in Jenkins and enumerate the pipeline types.
  • What is meant in Jenkins by an Agent Directive?
  • Bring out differences in Jenkins, Ant and Maven.
  • How does one set up the process for a Jenkins job?
  • What measures are used to secure Jenkins?
  • In Jenkins, what is meant by an agent?
  • Define the Jenkins parameters.
  • How does one configure communications between Jenkins master and its node agent?
  • What is meant by a trigger? Explain polling of the repository when a new commit is discovered.
  • Explain uses of the directory of JENKINS_HOME.
  • What and when is the backup plugin used? 
  • What does one do if one has a broken project build?
  • When working on a pipeline, if the second job fails, after the first job was successful, what should one do?
  • How do you copy and move Jenkins to a new server from an older one?
  • Explain what is meant by the Git plugin.
  • What is meant by Maven, and what benefits accrue when Jenkins and Maven are integrated?
  • How are automated tests run on Jenkins? 
  • Explain Kubernetes and how to integrate it with Jenkins?
  • Explain with an example what is cloud computing and where does Jenkins fit in?

Conclusion

Jenkins was originally known as Hudson and renamed by Oracle as Jenkins when it took over its ownership. Jenkins is a tool for real-time testing and continuous integration of largely automated builds. It reports the smaller builds of a larger Java code chunk, resulting in automation of the system, which is extremely time-saving for testers and developers alike.

When preparing for Jenkins interview questions, it is critical to revise by writing down simple use cases, the use of plugins like Git, Amazon EC2, Azure, Kubernetes, the types of pipelines, dashboard view, SCM, and such topics, interview questions on Maven, Jenkins tool and Jenkins basic interview questions. One should also use free resources like 189 Programming Questions and Solutions to build an exhaustive question base. So all the best for Jenkins interview questions!

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