Jenkins Jenkins Administration

Question 1

Where does Jenkins store its configuration, jobs, and plugins by default on a Linux system?

Accepted Answer

/var/lib/jenkins

Answer

/etc/jenkins

Answer

/opt/jenkins/data

Answer

/home/jenkins/.jenkins

Question 2

What is the recommended way to apply Jenkins system configuration as code rather than through the UI?

Accepted Answer

Jenkins Configuration as Code (JCasC) Plugin

Answer

Groovy Init Scripts

Answer

Jenkins CLI

Answer

Ansible Playbooks

Question 3

Which file in JENKINS_HOME contains the main Jenkins system configuration?

Accepted Answer

config.xml

Answer

jenkins.xml

Answer

system.xml

Answer

settings.xml

Question 4

How do you safely restart Jenkins without losing queued builds?

Accepted Answer

Use /safeRestart endpoint or Manage Jenkins > Reload Configuration

Answer

Restart the OS

Answer

Kill the Jenkins process

Answer

Use /restart endpoint immediately

Question 5

What is the purpose of the Jenkins CLI tool (`jenkins-cli.jar`)?

Accepted Answer

Perform administrative tasks via command line without a browser

Answer

Deploy Jenkins to servers

Answer

Build and compile Jenkins plugins

Answer

Monitor Jenkins agent health

Question 6

What is the default port Jenkins listens on when installed from the official package?

Accepted Answer

8080

Answer

8443

Answer

9090

Answer

3000