CV0-004 Deployment Practice Question
An organization is migrating a 50 TB on-premises Oracle database to Amazon RDS for MySQL with minimal downtime. They plan to use AWS DMS with ongoing replication. Which additional step is necessary to reduce downtime during the final cutover?
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
✓
Enable change data capture (CDC) on the source database
To minimize downtime, after the full load, CDC replication keeps the target in sync. During final cutover, stopping application writes and applying remaining CDC changes completes the migration with very little 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.
- ✗
Use AWS Schema Conversion Tool (AWS SCT) to convert the schema
Why it's wrong here
Schema conversion is needed for heterogeneous migrations but does not reduce cutover downtime.
- ✓
Enable change data capture (CDC) on the source database
Why this is correct
Correct. CDC allows DMS to capture ongoing changes, enabling near-zero downtime during cutover.
- ✗
Increase the allocated storage on the target RDS instance
Why it's wrong here
Storage size does not affect downtime during final cutover.
- ✗
Use AWS Snowball to transfer the initial data load
Why it's wrong here
Snowball is for offline data transfer, not suitable for minimizing downtime in this context.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.