Question 1,351 of 1,663
DBS-C01 Workload-Specific Database Design Practice Question
A company needs to migrate an on-premises PostgreSQL database to Amazon Aurora PostgreSQL. The database is 2 TB in size and has a 24/7 uptime requirement. Which AWS service should be used to perform the migration with minimal downtime?
⚠ Common exam trap
A common mix-up: candidates choose pg_dump and pg_restore (Option C) because they are familiar PostgreSQL tools, but they overlook the 24/7 uptime requirement and the fact that pg_dump requires a consistent snapshot, which for a 2 TB database would cause hours of downtime during the dump and restore process.
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) is the correct choice because it supports ongoing replication from an on-premises PostgreSQL source to Amazon Aurora PostgreSQL, enabling a migration with minimal downtime. DMS can perform a full load of the 2 TB database and then continuously replicate changes using PostgreSQL's logical replication (via the pglogical extension or native slot-based replication) until the cutover, keeping the source available throughout the process.
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
SCT only converts schema, not data.
- ✗
AWS S3
Why it's wrong here
S3 is not a database migration service.
- ✗
pg_dump and pg_restore
Why it's wrong here
Requires downtime.
- ✓
AWS Database Migration Service (DMS)
Why this is correct
DMS supports live migration with CDC.
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Last reviewed: Jul 4, 2026
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.
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