DEA-C01 Data Operations and Support Practice Question
A data engineer is designing a data pipeline that ingests data from an on-premises database into Amazon S3 using AWS Database Migration Service (DMS). The data must be encrypted at rest in S3 using SSE-S3. The engineer also needs to track changes to the source database in real time. Which DMS configuration should the engineer use?
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 DMS with ongoing replication (change data capture) enabled.
DMS with ongoing replication (change data capture) enables real-time tracking of changes from the source database. Option A is incorrect because using a snapshot only captures data at a point in time, not real-time changes. Option C is incorrect because a full load task only loads existing data without capturing ongoing changes. Option D is incorrect because streaming to Amazon Kinesis is unnecessary; DMS CDC can directly replicate changes to S3. Encryption at rest in S3 with SSE-S3 is automatically supported by DMS when writing to S3.
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 DMS with a snapshot of the source database.
Why it's wrong here
Snapshots are point-in-time, not real-time.
- ✓
Use DMS with ongoing replication (change data capture) enabled.
Why this is correct
CDC captures real-time changes.
- ✗
Use DMS with a full load task only.
Why it's wrong here
Full load does not capture ongoing changes.
- ✗
Use DMS with a full load task and then stream to Amazon Kinesis.
Why it's wrong here
DMS can directly capture changes without Kinesis.
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 |
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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.