Build triggers (poll SCM, webhook, timer) in Jenkins - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable polling the SCM every 15 minutes.

Jenkins

triggers {
  pollSCM('[1]')
}

Drag options to blanks, or click blank then click option'

AH/5 * * * *

BH/15 * * * *

CH/30 * * * *

DH/60 * * * *

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'H/5' polls every 5 minutes, which is too frequent.

Using 'H/60' polls only once per hour.

The cron syntax H/15 * * * * means Jenkins polls the SCM every 15 minutes.

2fill in blank

medium

Complete the code to trigger a build when a webhook is received.

Jenkins

triggers {
  [1]()
}

Drag options to blanks, or click blank then click option'

AgithubPush

BpollSCM

Ctimer

Dcron

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'pollSCM' triggers polling, not webhook.

Using 'timer' or 'cron' triggers time-based builds.

The githubPush() trigger starts a build when a webhook from GitHub is received.

3fill in blank

hard

Fix the error in the timer trigger syntax to run every day at midnight.

Jenkins

triggers {
  timer('[1]')
}

Drag options to blanks, or click blank then click option'

A0 0 0 * *

B0 24 * * *

C24 0 * * *

D0 0 * * *

Attempts:

3 left

💡 Hint

Common Mistakes

Using '0 24 * * *' is invalid because hour 24 does not exist.

Using '24 0 * * *' swaps hour and minute.

The correct cron syntax for midnight daily is 0 0 * * *.

4fill in blank

hard

Fill both blanks to set up polling every 10 minutes and a timer at 2 AM daily.

Jenkins

triggers {
  pollSCM('[1]')
  timer('[2]')
}

Drag options to blanks, or click blank then click option'

AH/10 * * * *

B0 2 * * *

CH/15 * * * *

D0 0 * * *

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the cron fields or using wrong hour values.

H/10 * * * * polls every 10 minutes, and 0 2 * * * triggers at 2 AM daily.

5fill in blank

hard

Fill all three blanks to configure polling every 5 minutes, webhook trigger, and timer at 11 PM.

Jenkins

triggers {
  pollSCM('[1]')
  [2]()
  timer('[3]')
}

Drag options to blanks, or click blank then click option'

AH/5 * * * *

BgithubPush

C0 23 * * *

DpollSCM

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing polling and webhook triggers.

Using invalid cron syntax for 11 PM.

Polling every 5 minutes uses H/5 * * * *, webhook trigger is githubPush(), and timer at 11 PM is 0 23 * * *.