Jenkins Jenkins Build Triggers and Scheduling 3

Question 1

What is the purpose of the 'Quiet Period' setting in a Jenkins job configuration?

Accepted Answer

Delays the build start to allow multiple incoming changes to be batched together

Answer

The Quiet Period causes Jenkins to wait a specified number of seconds before starting a triggered build, allowing additional commits to accumulate into a single build.

Question 2

Which trigger type in Jenkins allows builds to be queued when an upstream job is UNSTABLE in addition to successful?

Accepted Answer

Build after other projects are built (with 'Trigger even if the build is unstable' option)

Answer

The 'Build after other projects are built' trigger has a configurable threshold option that can include unstable builds as valid trigger conditions.

Question 3

In Jenkins, what does setting a job's 'Build Periodically' trigger to 'H H(6-8) * * 1-5' mean?

Accepted Answer

Build once per day, sometime between 6 AM and 8 AM, only on weekdays

Answer

H H(6-8) means once at a hashed time within the 6–8 hour range, and 1-5 restricts it to Monday through Friday.

Question 4

What Jenkins feature prevents a new build from being triggered if the same job is already building?

Accepted Answer

Do not allow concurrent builds

Answer

The 'Do not allow concurrent builds' checkbox in job configuration ensures only one instance of the job runs at a time, discarding or queuing new triggers.

Question 5

Which Jenkins plugin enables triggering builds based on file system changes rather than SCM commits?

Accepted Answer

FSTrigger Plugin

Answer

The FSTrigger Plugin monitors the file system for changes (file creation, modification, deletion) and triggers builds accordingly without needing a version control system.

Jenkins Practice Test

Jenkins Practice Test

Jenkins Jenkins Build Triggers and Scheduling 3