[Solved] What does the ReadWriteOnce access mode guarantee for a PersistentVolumeClaim in Kubernetes? — Ans: Volume can be mounted as read-write by a single node at a time | Kubernetes

Kubernetes - Persistent Storage

What does the ReadWriteOnce access mode guarantee for a PersistentVolumeClaim in Kubernetes?

AVolume can be mounted as read-write by a single node at a time

BVolume can be mounted as read-write by multiple nodes simultaneously

CVolume can be mounted as read-only by multiple nodes

DVolume can be mounted as read-only by a single node

Step-by-Step Solution

Solution:

Step 1: Define ReadWriteOnce
ReadWriteOnce means the volume can be mounted as read-write but only by one node at a time.
Step 2: Eliminate other options
Multiple nodes read-write is ReadWriteMany; multiple nodes read-only is ReadOnlyMany; single node read-only is not a standard mode.
Final Answer:
ReadWriteOnce allows single node read-write mount -> Option A
Quick Check:
ReadWriteOnce = B [OK]

Quick Trick: ReadWriteOnce means one node read-write only [OK]

Common Mistakes:

Master "Persistent Storage" in Kubernetes

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What does the ReadWriteOnce access mode guarantee for a PersistentVolumeClaim in Kubernetes?