PAS-C01 Migration Practice Question
A company is migrating an on-premises Oracle database to Amazon RDS for Oracle. The database is 2 TB in size and has a 24-hour maintenance window. The migration must minimize downtime and support ongoing replication during the cutover. Which AWS service should be used for 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) supports ongoing replication from on-premises to RDS with minimal downtime, using change data capture (CDC) for continuous sync. Option A (AWS Snowball Edge) is for large data transfer but does not support ongoing replication. Option C (Amazon S3 Transfer Acceleration) speeds up uploads to S3 but does not directly migrate databases. Option D (AWS Server Migration Service) is for server-level migrations, not database-specific 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 Snowball Edge
Why it's wrong here
AWS Snowball Edge is designed for large-scale data transfer, not for ongoing database replication.
- ✓
AWS Database Migration Service (DMS)
Why this is correct
AWS DMS supports continuous replication and minimal downtime for database migrations.
- ✗
Amazon S3 Transfer Acceleration
Why it's wrong here
Amazon S3 Transfer Acceleration is for fast uploads to S3, not for database migration.
- ✗
AWS Server Migration Service (SMS)
Why it's wrong here
AWS SMS is for migrating virtual machines, not databases.
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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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.