DEA-C01 Data Operations and Support Practice Question
A company uses Amazon S3 to store sensitive data. The data engineer needs to ensure that all data in transit between the S3 bucket and clients is encrypted. Which configuration should the engineer implement?
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
✓
Create an S3 bucket policy that denies requests where SecureTransport is false.
An S3 bucket policy that denies requests where SecureTransport is false enforces HTTPS for all access, encrypting data in transit. Option A is wrong because CloudFront with SSL can enforce HTTPS but is not a direct S3 configuration and may incur additional costs. Option B is wrong because SSE-S3 only encrypts data at rest, not in transit. Option D is wrong because SSE-C also encrypts data at rest with a customer-provided key, not in 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.
- ✗
Use Amazon CloudFront to serve the content and enable SSL.
Why it's wrong here
CloudFront can help but does not enforce HTTPS for direct S3 access.
- ✗
Enable default encryption on the S3 bucket using SSE-S3.
Why it's wrong here
This encrypts data at rest, not in transit.
- ✓
Create an S3 bucket policy that denies requests where SecureTransport is false.
Why this is correct
This ensures all requests use HTTPS, encrypting data in transit.
- ✗
Use SSE-C to encrypt the data with a customer-provided key.
Why it's wrong here
This is for server-side encryption at rest.
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
Related to this question
About these practice questions
Courseiva writes every DEA-C01 question from scratch — 1,711 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.