DEA-C01 Data Store Management Practice Question
A financial services company is designing a data store for transaction records that must be immutable and auditable. The data must be stored for 7 years. Which AWS services can be combined to meet these requirements? (Choose TWO.)
⚠ Common exam trap
Test-takers frequently confuse backup solutions (like RDS automated backups or DynamoDB PITR) with immutable storage, but backups are deletable and do not enforce WORM, whereas S3 Object Lock provides true immutability required for audit compliance.
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
✓
Amazon S3 Glacier Deep Archive
Amazon S3 Glacier Deep Archive is correct because it provides the lowest-cost storage for long-term retention of immutable data, with a 7-year lifecycle meeting compliance requirements. Amazon S3 with Object Lock enabled is correct because it enforces a write-once-read-many (WORM) model, preventing records from being deleted or overwritten for a specified retention period, ensuring immutability and auditability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Amazon S3 Glacier Deep Archive
Why this is correct
Glacier Deep Archive is cost-effective for long-term archival.
- ✓
Amazon S3 with Object Lock enabled
Why this is correct
Object Lock provides immutability and retention.
- ✗
Amazon EBS volume with snapshots
Why it's wrong here
EBS is block storage, not designed for immutable object storage.
- ✗
Amazon RDS with automated backups
Why it's wrong here
RDS backups are not immutable.
- ✗
Amazon DynamoDB with point-in-time recovery
Why it's wrong here
DynamoDB is a mutable database.
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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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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