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CKA study material · question 803 of 1000

A PersistentVolume is declared ReadOnlyMany, yet a Pod writes to it successfully. Why?

  1. The Pod has the CAP_SYS_ADMIN capability
  2. The claim requested ReadWriteMany, which overrides the volume
  3. Access modes are matching criteria and do not enforce write protection
  4. The CSI driver upgraded the mode automatically
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Answer: C. Access modes are matching criteria and do not enforce write protection

Access modes are used to match claims to volumes and place no constraint on the mounted filesystem; only ReadWriteOncePod is genuinely constrained. Read-only enforcement comes from the mount itself.

Source: Persistent Volumes (Kubernetes) — Access Modes

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