EX280 Storage And Persistent Volumes Practice Question

What is the effect of setting 'allowVolumeExpansion: true' in a StorageClass?

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

✓

It permits users to increase the storage size of PVCs created from this StorageClass.

It allows users to edit existing PersistentVolumeClaims associated with this StorageClass to request a larger storage size.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
It automatically shrinks PVCs when storage usage drops below 50%.
Why it's wrong here
Volume shrinking is generally not supported in Kubernetes/OpenShift CSI drivers.
✓
It permits users to increase the storage size of PVCs created from this StorageClass.
Why this is correct
Enabling volume expansion permits PVC resizing.
✗
It allows multiple pods to write to an RWO volume simultaneously.
Why it's wrong here
Access modes govern multi-pod mounting, not volume expansion.
✗
It allows the cluster to automatically scale the number of worker nodes based on storage demand.
Why it's wrong here
Node scaling is handled by Cluster Autoscaler and MachineConfig/MachineSets, not storage classes.

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Written and reviewed by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

Last reviewed August 2026 · checked against the official Red Hat exam blueprint

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