Question 193 of 1,711
DEA-C01 Data Ingestion and Transformation Practice Question
A data engineering team is using AWS DMS to migrate a 2 TB Oracle database to Amazon RDS for PostgreSQL. The migration must have minimal downtime and needs to capture ongoing changes after the full load. Which THREE resources are required for this task? (Choose three.)
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
✓
A DMS source endpoint configured for Oracle.
A source endpoint for Oracle is required to connect to the source Oracle database. Option B is correct because an AWS DMS replication instance is needed to run the migration tasks. Option E is correct because a target endpoint for Amazon RDS PostgreSQL is required. Option C is incorrect because an AWS Snowball Edge device is used for offline data transfer, not for DMS ongoing replication. Option D is incorrect because an Amazon S3 bucket is not required for a direct DMS migration; it would be used only if staging in 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.
- ✓
A DMS source endpoint configured for Oracle.
Why this is correct
Connects to the source Oracle database.
- ✓
An AWS DMS replication instance.
Why this is correct
Required to execute the migration tasks.
- ✗
An AWS Snowball Edge device for initial data transfer.
Why it's wrong here
Snowball is for large offline migrations, not for DMS.
- ✗
An Amazon S3 bucket for staging the data.
Why it's wrong here
Not required for DMS; DMS transfers directly.
- ✓
A DMS target endpoint configured for Amazon RDS PostgreSQL.
Why this is correct
Connects to the target RDS PostgreSQL database.
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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Last reviewed: Jun 20, 2026
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.
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