PAS-C01 Migration Practice Question
A company is migrating a legacy on-premises Oracle database to Amazon RDS for Oracle. They need to minimize downtime. Which AWS service should they use for ongoing replication during the migration?
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
✓
AWS Database Migration Service (DMS)
AWS Database Migration Service (DMS) with ongoing replication (change data capture) allows near-zero downtime migration. Option A (AWS Schema Conversion Tool) is wrong because it is a schema conversion tool, not a replication service. Option B (AWS Server Migration Service) is wrong because it is for server migration, not database replication. Option D (AWS DataSync) is wrong because it is for file/object storage, not database replication.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS Schema Conversion Tool (SCT)
Why it's wrong here
AWS Schema Conversion Tool is a schema conversion tool, not a replication service.
- ✗
AWS Server Migration Service (SMS)
Why it's wrong here
AWS Server Migration Service is for server migration, not database replication.
- ✓
AWS Database Migration Service (DMS)
Why this is correct
AWS Database Migration Service with ongoing replication (CDC) allows near-zero downtime migration.
- ✗
AWS DataSync
Why it's wrong here
AWS DataSync is for file/object storage, not database replication.
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 PAS-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 PAS-C01 exam.