DEA-C01 Data Ingestion and Transformation Practice Question
A data engineer needs to ingest data from an on-premises Oracle database into Amazon S3 using AWS DMS. The change data capture (CDC) must be enabled to capture ongoing changes. Which additional AWS service is required to store the transaction logs for CDC?
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
✓
Amazon S3
AWS DMS change data capture (CDC) for Oracle databases does not require an additional AWS service to store transaction logs. DMS reads the redo logs directly from the source Oracle database, either using LogMiner or binary reader. Therefore, none of the listed services are needed for storing transaction logs. As none of the provided options are correct, this question contains no valid answer.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon RDS
Why it's wrong here
Amazon RDS is a managed database service, not used for storing transaction logs for DMS CDC.
- ✓
Amazon S3
Why this is correct
Amazon S3 is not required; DMS reads redo logs directly from the source database.
- ✗
Amazon EBS
Why it's wrong here
Amazon EBS is block-level storage for EC2, not for storing DMS transaction logs.
- ✗
Amazon CloudWatch Logs
Why it's wrong here
Amazon CloudWatch Logs is for monitoring log data, not for storing transaction logs for DMS CDC.
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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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.