CV0-004 Deployment Practice Question
A data scientist is migrating a 10 TB on-premises PostgreSQL database to Amazon RDS for PostgreSQL. The migration must have minimal downtime. Which TWO AWS services should the data scientist use together to achieve this? (Select TWO.)
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 Direct Connect
To migrate a 10 TB PostgreSQL database to RDS with minimal downtime, AWS DMS provides ongoing replication via change data capture (CDC), allowing continuous data synchronization after the full load. AWS Direct Connect offers a dedicated, stable network connection with consistent bandwidth and low latency, which is critical for replicating such a large volume of data reliably and quickly. Without Direct Connect, internet-based replication could suffer from variable performance, risking the ability to keep the target in sync during the final cutover.
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 Snowball
Why it's wrong here
Snowball is offline, not minimal downtime.
- ✓
AWS Direct Connect
Why this is correct
Direct Connect provides stable network for DMS replication.
- ✗
AWS Schema Conversion Tool (SCT)
Why it's wrong here
SCT is for schema conversion, not required for same engine but can be used.
- ✓
AWS Database Migration Service (DMS)
Why this is correct
DMS supports CDC for minimal downtime.
- ✗
AWS DataSync
Why it's wrong here
DataSync transfers files, not database replication.
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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.