CKA Storage Practice Question
Which access mode allows a PersistentVolume to be mounted as read-write by multiple pods across different nodes?
⚠ Common exam trap
Many candidates confuse ReadWriteOnce (RWO) with the ability to mount across nodes, not realizing RWO is per-node, not per-pod, and that ReadWriteMany (RWX) is the only mode that explicitly allows multi-node read-write access.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
ReadWriteMany (RWX)
ReadWriteMany (RWX) is the correct access mode because it allows a PersistentVolume to be mounted as read-write by multiple pods simultaneously, even when those pods are scheduled on different nodes. This is the only access mode that supports concurrent read-write access across nodes, which is essential for shared storage solutions like NFS, GlusterFS, or CephFS.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
ReadWriteMany (RWX)
Why this is correct
RWX allows multiple nodes to mount the volume as read-write.
- ✗
ReadWriteOnce (RWO)
Why it's wrong here
RWO allows only one node to mount the volume as read-write.
- ✗
ReadWriteOncePod (RWOP)
Why it's wrong here
RWOP allows only one pod across the whole cluster to mount the volume as read-write.
- ✗
ReadOnlyMany (ROX)
Why it's wrong here
ROX allows multiple nodes to mount the volume but only as read-only.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CKA practice question is part of Courseiva's free CNCF certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CKA exam.