Jenkins Jenkins Installation and Configuration 2 — Questions and Answers
Question 1: Where does Jenkins store installed plugins by default?
- $JENKINS_HOME/plugins/ (Correct answer)
- $JAVA_HOME/plugins/
- /etc/jenkins/plugins/
- /usr/share/jenkins/plugins/
Correct answer: $JENKINS_HOME/plugins/
Jenkins installs plugins in the plugins subdirectory under JENKINS_HOME.
Question 2: What format are Jenkins plugin files distributed in?
- .jar
- .war
- .hpi or .jpi (Correct answer)
- .zip
Correct answer: .hpi or .jpi
Jenkins plugins are distributed as .hpi (Hudson Plugin Interface) or .jpi (Jenkins Plugin Interface) files.
Question 3: Which tool is used to install Jenkins on Linux using a package manager on RHEL/CentOS?
- apt-get
- yum or dnf (Correct answer)
- brew
- snap
Correct answer: yum or dnf
On RHEL/CentOS systems, Jenkins is installed using yum or dnf package managers after adding the Jenkins repo.
Question 4: What is the Jenkins WAR file used for?
- Backing up Jenkins configuration
- Running Jenkins as a standalone server via Java (Correct answer)
- Deploying Jenkins to a Kubernetes cluster
- Compiling Jenkins plugins
Correct answer: Running Jenkins as a standalone server via Java
The jenkins.war file is a self-contained web archive that can be run directly with `java -jar jenkins.war`.
Question 5: Which configuration approach allows Jenkins environment variables to be set system-wide for all jobs?
- Job-level environment injection
- Manage Jenkins > Configure System > Global properties (Correct answer)
- Jenkinsfile env block
- Pipeline script parameters
Correct answer: Manage Jenkins > Configure System > Global properties
Global environment variables for all jobs are configured under Manage Jenkins > Configure System > Global properties.
Question 6: What is the purpose of the Jenkins Manage Jenkins > System Information page?
- To display all installed plugins and their versions
- To show JVM properties, environment variables, and system properties for diagnostics (Correct answer)
- To manage user accounts and roles
- To configure global build tools
Correct answer: To show JVM properties, environment variables, and system properties for diagnostics
The System Information page displays JVM properties, environment variables, and memory usage useful for troubleshooting.
Jenkins Jenkins Installation and Configuration 2
Where does Jenkins store installed plugins by default?