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CKA study material · question 657 of 1000

A CronJob with no startingDeadlineSeconds misses its 02:00 run because the controller was down until 05:00. What happens when the controller returns?

  1. The missed run is skipped, since it is more than an hour late
  2. The missed run has no deadline and may still be started
  3. The CronJob is suspended automatically
  4. Only runs missed within the last 100 schedules are considered
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Answer: B. The missed run has no deadline and may still be started

Without startingDeadlineSeconds the occurrences have no deadline at all, so a controller that comes back late will still start them — which is why the field is worth setting on time-sensitive jobs.

Source: CronJob (Kubernetes) — CronJob limitations › Starting deadline

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