30
MarGrab Deal : Flat 23% off on live classes + 2 free self-paced courses as a bonus! - SCHEDULE CALL
In this blog for Jenkins Interview questions and answer, we will discuss the top questions that are prepared by expert mentors and it will surely help you cracking the interview in 2018 and beyond. Jenkins is a popular DevOps tool that helps you to automate the business process with the help of plug-ins. These questions are taken by experts who are directly involved in the hiring process. Curious to check out the list of questions then read the blog thoroughly and start the preparation right away.
Jenkins is a popular automation tool with source code repository and plugins that are written in Java and responsible for continuous integration and delivery. With the help of Jenkins, software products are tested continuously and it becomes easy for developers to integrate changes with the existing project whenever needed. So, we can say making a new build with Jenkins is much easier than you may think. It enhances the continuous delivery of the project by integrating the software with plenty of testing tools and deployment methodologies.
Once you are sure on the definition of Jenkins, let us discuss the use cases mentioned below –
Yes, Of Course! This is the Java programming language that is used to build Jenkins.
Here, you can check the most popular features of Jenkins at a glance –
Continuous integration is the popular software engineering practice where isolated changes are tested frequently and reported at the same time. After this, changes are added to the larger code base. Continuous integration is a development practice too where the code is integrated with the repository rapidly, it may several times a day as well. Further, the integration is validated through automated builds and tests.
A Jenkins Pipeline is simply a set of plugins that support continuous integration and implementation in the Jenkins.
The continuous delivery pipeline is the automated expression of the process for version control from different users or customers.
The Jenkins pipeline details are stored in a file that is named as the Jenkins file and it is further connected to the source code repository in general.
Here, we have given the pretty simple example for your reference –
Jenkinsfile (Declarative Pipeline)
Read: Jenkins Certification A complete Guide
pipeline {
agent { docker ‘maven: 3.3.3’}
stages {
stage (‘build’){
steps{
sh ‘mvn—version’
}
}
}
}
This is a highly simple concept in Jenkins that presents a more simplified syntax on the top of pipeline sub-systems. Check the valid pipeline block example as given below –
Pipeline {
Read: Why Everyone’s Becoming that Certified DevOps Dude and How?
/*insert Declarative Pipeline here */
}
DevOps Training & Certification Course
An agent in Jenkins describes the complete pipeline or a particular stage where execution will take place or where the agent is located. This section is available at the higher level inside the pipeline block, but the usage of stage-level is generally optional.
The objective of agent directive in Jenkins is to check how or where the pipeline can be executed. Most of the times, the agent is needed for all possible pipelines.
To support a variety of use cases pipeline in Jenkins, the tool relies on parameters solely. These parameters are usually applied at the higher level of pipeline block or within multiple stages of directives.
The post is one more additional step that will run upon the completion of a pipeline block. The post can support a plenty of post-conditional blocks and makes execution much easier and logical in DevOps.
When one or more stage directives are defined together, the stage is the place where bulk work can be described in detail. Make sure that for each stage directive, there is one stage defined properly to manage the discrete parts of the continuous delivery process like deploy, manage, or build etc.
With the help of environmental directives, we can specify a complete sequence of the key-value pairs that could be defined as the environment variables too for different steps where the environment directive is located within the pipeline.
To re-trigger the pipeline in multiple automated ways, triggers are defined in the Jenkins. A few pipelines are integrated with sources like GitHub, BitBucket, or other triggers first then they are implemented to perform a specific action.
With the help of input directives, you could prompt the inputs with the help of input steps. The stage is paused after different options have been applied and before you enter to the stage agent to evaluate its condition. When the input is approved, you could continue with the stage ahead. The parameters that given as the part of input submission will be available in the environment for the rest of the stage.
Read: What are the difference between Git Push and Git Push Origin?
In case of the declarative Pipeline, a plenty of nested stages can be defined together and they are executed in parallel. The parallel stages generally don’t contain any agent or tools because they are not relevant here.
The scripted pipeline is very much similar to the declarative pipeline that s build on the top of the underlying pipeline sub-system. We can say that scripted pipeline is a general-purpose language based on Groovy. A list of features or benefits that are available in Groovy can be used along scripted pipeline too. In brief, this is a highly flexible tool that results in multiple continuous delivery pipelines.
When scripted pipelines are executed in a sequential order from top to the downwards then it is called as control flows in the pipeline.
You need an accessible source code repository (SCR) and a working build script too.
These are Maven, Git, GitHub, Amazon EC2, Join, HTML publisher, Green Balls, or Copy artifacts etc. I found these plugins highly popular that are mentioned above. But there are a plenty of plugins available that can be used as per your convenience.
Well, this would be interesting knowing that Hudson is the traditional name for Jenkins.
If any broken build is found then check the local work space immediately and try to fix it quickly.
DevOps Training & Certification Course
I hope you enjoyed reading this blog for top Jenkins interview questions in 2018. If there is something in your mind, don’t forget to share with us. Once you will go through each of the questions carefully, there is no way to stop you from getting your dream job. For a detailed explanation and the proper interview assistance, join DevOps certification course online at JanBask Training and fly higher like never before.
A dynamic, highly professional, and a global online training course provider committed to propelling the next generation of technology learners with a whole new way of training experience.
AWS
DevOps
Data Science
Hadoop
Salesforce
QA
Business Analyst
MS SQL Server
Python
Artificial Intelligence
Machine Learning
Tableau
Search Posts
Related Posts
Receive Latest Materials and Offers on DevOps Course
Interviews