DEA-C01 Data Security and Governance Practice Question
A data engineer is designing a data lake on S3 with sensitive data. The security policy mandates that data must be encrypted at rest and in transit, and that an inventory of all objects must be maintained for compliance. Which actions should be taken?
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
✓
Enforce HTTPS via bucket policy, enable default SSE-S3 encryption, and enable S3 Inventory.
It covers all requirements: encryption in transit (HTTPS enforcement via bucket policy), encryption at rest (default SSE-S3), and compliance inventory (S3 Inventory). Option B uses SSE-KMS which is not required and lacks inventory. Option C includes at-rest encryption and inventory but misses in-transit encryption. Option D includes in-transit encryption but lacks at-rest encryption and compliance inventory.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enforce HTTPS via bucket policy, enable default SSE-S3 encryption, and enable S3 Inventory.
Why this is correct
Covers in-transit, at-rest encryption, and inventory.
- ✗
Use SSE-KMS encryption and enable CloudTrail for S3 events.
Why it's wrong here
Missing in-transit encryption and inventory.
- ✗
Enable S3 default encryption using SSE-S3 and enable S3 Inventory.
Why it's wrong here
Missing in-transit encryption requirement.
- ✗
Enforce HTTPS using bucket policy and enable S3 Server Access Logging.
Why it's wrong here
Missing at-rest encryption and inventory.
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
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.