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CKA study material · question 530 of 1000

A ConfigMap in namespace app-a carries an ownerReference naming a Deployment in namespace app-b. What becomes of the ConfigMap?

  1. It is protected from deletion until the Deployment is removed
  2. The owner reference is treated as absent, making the ConfigMap eligible for deletion
  3. The API server rejects the ConfigMap at admission
  4. It is automatically copied into namespace app-b
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Answer: B. The owner reference is treated as absent, making the ConfigMap eligible for deletion

Cross-namespace owner references are disallowed by design; a namespaced owner must live in the dependent's own namespace, and an unresolvable reference is treated as no owner at all.

Source: Garbage Collection (Kubernetes) — Owners and dependents

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