DBS-C01 Deployment and Migration Practice Question
A company is migrating a 500 GB PostgreSQL database from on-premises to Amazon Aurora PostgreSQL. They need to minimize downtime and ensure that all data changes made during migration are synchronized. Which three components are required for this migration? (Choose THREE.)
⚠ Common exam trap
The DBS-C01 exam often tests the misconception that AWS Schema Conversion Tool is always needed for any database migration, but it is only required when migrating between different database engines, not for homogeneous migrations like PostgreSQL to Aurora PostgreSQL.
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) replication instance
AWS DMS replication instance is required because it orchestrates the continuous replication of data from the source PostgreSQL database to the target Aurora PostgreSQL cluster. It manages the connection, reads changes from the source using logical replication slots, and applies them to the target, enabling near-zero downtime migration.
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 Database Migration Service (DMS) replication instance
Why this is correct
DMS orchestrates the migration and replication.
- ✗
AWS Schema Conversion Tool (SCT)
Why it's wrong here
Not required because both source and target are PostgreSQL.
- ✓
Amazon Aurora PostgreSQL cluster as the target
Why this is correct
The target database must be created before migration.
- ✓
Source PostgreSQL database configured with logical replication
Why this is correct
Required for ongoing replication via DMS.
- ✗
AWS VPN connection between on-premises and AWS
Why it's wrong here
VPN is not required; DMS can work over the internet with proper security.
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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.