DBS-C01 Deployment and Migration Practice Question
A company needs to migrate an on-premises PostgreSQL database to Amazon Aurora PostgreSQL with minimal downtime. Which AWS service should be used for the ongoing replication?
⚠ Common exam trap
Many exam-takers confuse AWS DMS with AWS SCT, thinking SCT handles both schema conversion and data migration, but SCT only converts schemas and generates migration scripts, while DMS handles the actual data movement and ongoing replication.
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 (change data capture, CDC) from an on-premises PostgreSQL source to an Amazon Aurora PostgreSQL target using logical replication slots. This allows you to keep the target database synchronized with minimal downtime after the initial full load, making it the correct choice for a migration with minimal downtime.
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 Glue.
Why it's wrong here
Glue is for ETL, not database replication.
- ✗
AWS Backup.
Why it's wrong here
Backup is for snapshots, not replication.
- ✓
AWS Database Migration Service (DMS).
Why this is correct
DMS provides CDC for ongoing replication.
- ✗
AWS Schema Conversion Tool (SCT).
Why it's wrong here
Only converts schema.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DBS-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 DBS-C01 exam.