Question 546 of 1,663
DBS-C01 Deployment and Migration Practice Question
A company is migrating a 2 TB Oracle database to Amazon Aurora PostgreSQL. They need to minimize downtime and ensure data consistency. Which migration strategy should they use?
⚠ Common exam trap
Many exam-takers assume a full-load-only approach (Option A) is sufficient for large databases, underestimating the downtime required to stop writes and the risk of data inconsistency, while overlooking that DMS's ongoing replication is the only option that combines minimal downtime with continuous data synchronization.
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
✓
Use AWS DMS with ongoing replication (change data capture) from Oracle to Aurora.
AWS DMS with ongoing replication (change data capture) is the correct strategy because it allows continuous synchronization of changes from the source Oracle database to the target Aurora PostgreSQL, minimizing downtime to just the final cutover window. This approach ensures data consistency by applying transactional changes in near real-time, which is essential for a 2 TB database where a full load alone would require a lengthy maintenance window and risk data divergence.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use AWS DMS with full load only, then cut over during a maintenance window.
Why it's wrong here
Full load only does not capture ongoing changes, leading to longer downtime during cutover.
- ✓
Use AWS DMS with ongoing replication (change data capture) from Oracle to Aurora.
Why this is correct
DMS CDC captures ongoing changes, allowing near-zero downtime migration.
- ✗
Export the database to Amazon S3 using Oracle Data Pump, then import into Aurora.
Why it's wrong here
This process is manual and does not support continuous replication, resulting in significant downtime.
- ✗
Use pg_dump to export the database and pg_restore to import into Aurora.
Why it's wrong here
pg_dump/pg_restore requires the source database to be read-only during export, causing downtime.
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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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