Jenkins Questions & Answers
- Posted by TechLink
- Categories IT Support
- Date August 28, 2024
- Comments 0 comment
Beginner Level Jenkins Interview Questions
1. What is Jenkins?
Jenkins is an open-source free automation tool used to build and test software projects. The tool makes it painless for developers to integrate changes to the project. Jenkins’ primary focus is to keep track of the version control system and initiate and monitor a build system if there are any changes. It keeps an eye on the entire process and provides reports and notifications to alert.
Some typical reasons as to why Jenkins is so widely used are:
- Developers and testers use Jenkins to detect defects in the software development lifecycle and automate the testing of builds.
- They use it to continuously monitor the code in real-time and integrate changes into the build.
- Jenkins as it turns out, is a great fit for building a CI/CD pipeline because of its plugin-capabilities, and simple-to-use nature.
2. What are the features of Jenkins?
Some of the crucial features of Jenkins are the following:
- It is a free and open-source automation tool
- Jenkins provides a vast number of plugins
- It is easy to set up and install on multiple operating systems
- Provides pipeline support
- Fast release cycles
- Easy upgrades
3. What is Groovy in Jenkins?
- Apache Groovy is a dynamic object-oriented programming language used as a scripting language for Java platforms.
- Groovy is used to orchestrate the Jenkins pipeline and enables different teams to contribute to the work in different languages.
- Groovy’s syntax is very similar to that of Java, making it more seamless with the Java interface.
- The language has several features like Java compatibility and Development support.
4. How do you install Jenkins?
Follow the steps mentioned below to install Jenkins:
- Install Java
- Install Apache Tomcat Server
- Download Jenkins war File
- Deploy Jenkins war File
5. Which commands can be used to begin Jenkins?
Here are the commands used to start Jenkins:
- Open the command prompt
- After the command prompt opens, browse to the directory where Jenkins war is present
- Then run the following command:
D:\>Java -jar Jenkins.war
6. What is “Continuous Integration” with reference to Jenkins?
- Continuous Integration is a development practice where the codes can be integrated into a shared repository.
- The practice uses automated verifications for the early detection of code problems.
- Continuous Integration triggers the build to find and identify bugs present in the code.
- It adds consistency to the build process.
- It’s a means to build things faster and prevents broken code.
7. What are the differences between Continuous Integration, Continuous Delivery, and Continuous Deployment?
Continuous Integration | Continuous Delivery | Continuous Deployment |
Continuous Integration (CI) is a DevOps software development practice that permits developers to combine/merge the changes to their code in the central repository to run automated builds and tests. | Continuous Delivery (CD) refers to the building, testing, and delivering improvements to the software code. The most critical part of the CD is that the code is always in a deployable state. | Continuous Deployment (CD) is the ultimate stage in the DevOps pipeline. It refers to automatic release of any developer changes from the repository to the production stage. |
8. What is a CI/CD pipeline?
CI/CD Pipeline or Continuous Integration/ Continuous Delivery is considered the DevOps approach’s backbone. The pipeline is responsible for building codes, running tests, and deploying new software versions.
9. What is a Jenkins pipeline?
- The pipeline represents the continuous delivery and continuous integration of all the jobs in the SDLC and DevOps life cycle.
- The Jenkins pipeline is a set of plugins that support implementation and integration of continuous delivery pipelines into Jenkins. It connects this pipeline in a particular format by Jenkins.
- The Jenkins pipeline solves several problems like the maintenance of thousands of jobs and maintaining deployment with needing to resort to other powerful methods.
10. Name the three different types of pipelines in Jenkins?
The three different types of Jenkins pipelines are:
- CI/CD pipeline
- Scripted pipeline
- Declarative pipeline
11. How can you set up a Jenkins job?
To set up a Jenkins job, you may follow these steps:
- Select New item from the menu
- Next, enter a name for the job and select a free-style job
- Click on OK to create a new job
- Hence, the next page that appears will allow you to configure your job.
12. What are the requirements for using Jenkins?
To use Jenkins, you require the following:
- A source code repository that can be accessed, for example, a Git repository.
- A build script, for example, a Maven script
13. Name the two components that Jenkins is mostly integrated with.
Jenkins is typically integrated with these two components:
- Version Control systems like Git and SVN (Apache Subversion)
- Build tools like Maven
14. Name some of the useful plugins in Jenkins.
Some of the plugins in Jenkins include:
- Maven 2 project
- Amazon EC2
- Copy artifact
- Join
- HTML publisher
- Green Balls
15. How can you create a backup and copy files in Jenkins?
- Jenkins stores all the settings, builds scripts, and logs in the home directory.
- Then, if you want to create a backup of this Jenkins set up all you have to do is copy this directory.
- The job directory may also be copied to clone a job or rename the directory.
Tag:help-desk, IT-Fundamentals, tech