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CKA study material · question 312 of 1000

What does the ReadWriteOnce access mode actually allow?

  1. One Pod anywhere in the cluster to use the volume
  2. Many nodes to mount it read-only
  3. Many nodes to mount it read-write
  4. One node to mount it read-write, so several Pods on that node may share it
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Answer: D. One node to mount it read-write, so several Pods on that node may share it

ReadWriteOnce is per node, not per Pod; ReadWriteOncePod is the mode that restricts it to a single Pod.

Source: Persistent Volumes (Kubernetes) — Access Modes

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