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Interview question · Cloud, Container & AI Infrastructure Security

How does Kubernetes admission control enforce security policy, and when do you use Pod Security Admission, CEL policies or webhooks?

RBAC decides who may create a pod; admission decides what kind of pod may exist. The scored answer layers the built-in options, handles webhook failure modes and remembers that the admission path is itself attack surface.

hardNewPreparation tags: Google, Amazon, MicrosoftUpdated Nov 2026

RBAC decides who may create a pod; admission decides what kind of pod may exist. The scored answer layers the built-in options, handles webhook failure modes and remembers that the admission path is itself attack surface.

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  1. 01 State the assumptions your answer depends on.
  2. 02 Explain the mechanism and choose a control.
  3. 03 Name a condition that would change your decision.

The worked answer includes an approach, scoring criteria and follow-up questions. Compare the reasoning with your own.

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What if · the follow-ups in this answer

The answer works through 4 follow-ups like an interviewer would

A cluster enforces 'no privileged pods' through a single policy webhook with failurePolicy Ignore. During an incident review, you find a privileged pod running in a production namespace, created at 02:14 while the webhook's pods were being rescheduled.

  1. How did the pod get admitted?
  2. How do you prevent the gap without making deployments fragile?
  3. Who created the pod, and what else do you check?
  4. How do you summarise Kubernetes admission control?

Each rung has a nudge, a model answer, the principle that carries over and the weak answer to avoid. Premium opens every answer and ladder.

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