CV0-004 Deployment Practice Question
A company is migrating a large Oracle database (2 TB) from on-premises to AWS RDS for Oracle. They require minimal downtime and need to keep the source database running during migration. Which AWS service should they use to achieve continuous replication?
⚠ Common exam trap
Many exam-takers confuse AWS DataSync or S3 Transfer Acceleration as suitable for database replication, but they lack CDC capabilities and are designed for file or object transfers, not transactional database 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
✓
AWS DMS with CDC
AWS DMS with Change Data Capture (CDC) is the correct choice because it enables continuous replication of ongoing changes from the source Oracle database to the target RDS for Oracle instance, allowing the source to remain fully operational during migration. CDC captures incremental changes (inserts, updates, deletes) from the source's redo logs, minimizing downtime to a brief cutover window. This meets the requirement of a 2 TB database with minimal downtime while keeping the source running.
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 file and object storage migration, not databases.
- ✓
AWS DMS with CDC
Why this is correct
AWS DMS with CDC enables continuous replication and minimal downtime.
- ✗
AWS S3 Transfer Acceleration
Why it's wrong here
S3 Transfer Acceleration speeds up uploads to S3, not for database replication.
- ✗
AWS Snowball Edge
Why it's wrong here
Snowball Edge is for large offline data transfer, not real-time database replication.
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JA
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.