DBS-C01 Deployment and Migration Practice Question
A company is migrating a 2 TB Oracle database to Amazon Aurora PostgreSQL. The migration must have minimal downtime and support ongoing replication. Which AWS service should be used?
⚠ Common exam trap
Test-takers frequently confuse AWS SCT (schema conversion) with the actual data migration, or they assume DataSync can handle database replication, but DMS is the only service that provides both schema conversion (via SCT integration) and ongoing data replication for heterogeneous migrations.
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 (AWS DMS)
AWS Database Migration Service (AWS DMS) is the correct choice because it supports ongoing replication (change data capture, CDC) from an Oracle source to an Amazon Aurora PostgreSQL target, enabling a migration with minimal downtime. DMS can handle a 2 TB database by using a large replication instance and tuning task settings, and it continuously replicates changes until the cutover is complete.
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 DataSync
Why it's wrong here
DataSync is for moving large datasets over network, not for database replication.
- ✗
Amazon S3 Glacier
Why it's wrong here
Glacier is a cold storage service, not a migration tool.
- ✓
AWS Database Migration Service (AWS DMS)
Why this is correct
DMS supports heterogeneous migrations and ongoing replication from Oracle to Aurora.
- ✗
AWS Schema Conversion Tool (AWS SCT)
Why it's wrong here
SCT is used for schema conversion, not data migration with ongoing replication.
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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.