DEA-C01 Data Store Management Practice Question
A media company stores large video files in Amazon S3 and uses Amazon CloudFront for content delivery. Users in different regions report slow download speeds for popular content. The data engineer needs to improve performance while minimizing cost. Which solution should the engineer implement?
⚠ Common exam trap
It's easy for candidates to confuse S3 Transfer Acceleration (which optimizes uploads) with download acceleration, or assume that multiple regional origins are needed when CloudFront's global edge network already handles geographic distribution.
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 CloudFront Origin Shield
CloudFront Origin Shield acts as a centralized caching layer in front of the S3 origin, reducing the number of requests that reach the origin and improving cache hit ratios. This minimizes latency for users in different regions by serving popular content from the edge or shield cache, while also reducing origin load and data transfer costs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Change the S3 storage class to S3 Standard-IA
Why it's wrong here
Storage class does not affect download speed; it only impacts cost and availability.
- ✗
Enable S3 Transfer Acceleration on the bucket
Why it's wrong here
S3 Transfer Acceleration is for uploads, not downloads.
- ✗
Create multiple S3 buckets in different regions and configure CloudFront with multiple origins
Why it's wrong here
This would complicate setup and not necessarily improve speed; CloudFront already uses edge locations.
- ✓
Enable CloudFront Origin Shield
Why this is correct
Origin Shield provides an additional cache layer that improves cache hit ratio and reduces load on the origin, thereby improving download performance for users.
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.