DEA-C01 Data Security and Governance Practice Question
A data engineer is setting up an Amazon EMR cluster to process sensitive data. The data is stored in S3 with SSE-S3. The company policy requires that data in transit between the EMR cluster and S3 be encrypted. Which configuration should be used?
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
✓
Enable S3 encryption in transit using TLS
Enabling S3 encryption in transit using TLS encrypts data between the EMR cluster and S3. Amazon S3 supports HTTPS (TLS) endpoints by default, and this ensures that data is encrypted during transfer. Option B is wrong because disabling encryption is not allowed per policy. Option C is incorrect because EMRFS with SSE-KMS encrypts data at rest, not in transit. Option D is wrong because SSE-C is also an at-rest encryption mechanism, not for transit.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable S3 encryption in transit using TLS
Why this is correct
TLS encrypts data in transit between EMR and S3.
- ✗
Disable encryption and use VPC endpoints
Why it's wrong here
VPC endpoints do not encrypt data in transit.
- ✗
Configure EMRFS to use SSE-KMS
Why it's wrong here
EMRFS with SSE-KMS encrypts at rest, not in transit.
- ✗
Use SSE-C for S3 objects
Why it's wrong here
SSE-C encrypts at rest, not in transit.
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.