DEA-C01 Data Store Management Practice Question
A media company stores video files in an Amazon S3 bucket with S3 Standard storage class. The files are accessed frequently for the first 30 days, then rarely after that. However, the company must be able to restore any deleted file within 7 days. The company wants to minimize storage costs while meeting the access and retention requirements. What should a data engineer do?
⚠ Common exam trap
The trap here is that candidates may overlook the requirement to restore deleted files within 7 days and focus only on cost optimization, leading them to choose a storage class like S3 Standard-IA or S3 One Zone-IA that lacks versioning or retention capabilities, or they may incorrectly assume S3 Object Lock can restore already deleted files.
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
✓
Use S3 Intelligent-Tiering and enable S3 Versioning on the bucket.
S3 Intelligent-Tiering automatically moves objects between access tiers (frequent, infrequent, and archive instant access) based on changing access patterns, which minimizes storage costs for data with unknown or changing access patterns. Enabling S3 Versioning allows the company to restore any deleted file within 7 days by reverting to a previous version, meeting the retention requirement without additional cost for a separate backup.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use S3 Standard-IA storage class from the start.
Why it's wrong here
Standard-IA has a minimum storage charge and is not optimal for frequent first-30-day access.
- ✗
Use a lifecycle policy to transition objects to S3 One Zone-IA after 30 days.
Why it's wrong here
One Zone-IA does not provide the same durability and does not offer deletion recovery.
- ✗
Use S3 Glacier Deep Archive after 30 days and enable S3 Object Lock for retention.
Why it's wrong here
Glacier Deep Archive has retrieval times of hours, not meeting the 7-day restore requirement.
- ✓
Use S3 Intelligent-Tiering and enable S3 Versioning on the bucket.
Why this is correct
S3 Intelligent-Tiering optimizes costs by moving data between access tiers, and Versioning allows recovery of deleted objects.
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
This DEA-C01 practice question is part of Courseiva's free Amazon Web Services 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 DEA-C01 exam.