EX280 Storage And Persistent Volumes Practice Question
An administrator needs to set a default StorageClass for the entire OpenShift cluster so that PVCs without a storageClassName specified automatically use it. How is this configured?
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
✓
By adding the annotation storageclass.kubernetes.io/is-default-class: "true" to the StorageClass object.
Annotating a StorageClass with 'storageclass.kubernetes.io/is-default-class: "true"' makes it the default storage class.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
By modifying the kube-controller-manager operator configuration.
Why it's wrong here
Default storage classes are managed purely via object metadata annotations.
- ✓
By adding the annotation storageclass.kubernetes.io/is-default-class: "true" to the StorageClass object.
Why this is correct
This specific annotation tells the cluster dynamic provisioner which StorageClass is the default.
- ✗
By naming the StorageClass 'default-sc' exactly.
Why it's wrong here
Name has no bearing on default behavior; the annotation is required.
- ✗
By setting defaultStorageClass: true in the cluster-config ConfigMap.
Why it's wrong here
Cluster-config ConfigMap does not manage default storage classes; annotations on the StorageClass object do.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
About these practice questions
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JA
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
This EX280 practice question is part of Courseiva's free Red Hat 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 EX280 exam.