CV0-004 Cloud Architecture and Design Practice Question
A healthcare organization must store patient imaging data that is accessed infrequently but must be retained for 7 years. They need the lowest-cost storage option while ensuring data can be retrieved within 12 hours if needed. Which storage class should they use?
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
✓
Archive storage (Glacier / Azure Archive)
Archive storage like Amazon S3 Glacier Deep Archive or Azure Archive is the lowest cost for long-term retention, with retrieval times ranging from minutes to 12 hours.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Object storage standard tier
Why it's wrong here
Standard tier is for frequently accessed data and is more expensive.
- ✓
Archive storage (Glacier / Azure Archive)
Why this is correct
Archive storage is cheapest for long-term retention with retrieval times up to 12 hours.
- ✗
Block storage with snapshots
Why it's wrong here
Block storage is for VMs and databases; snapshots are not designed for long-term archival.
- ✗
File storage (EFS / Azure Files)
Why it's wrong here
File storage is for shared file systems, not cost-effective for archival.
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 |
Go deeper
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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