PAS-C01 Migration Practice Question
A company is migrating its on-premises Oracle database to Amazon RDS for Oracle. They need to minimize downtime and ensure data consistency. Which AWS service should they use for the initial data load and ongoing replication?
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)
**Option A (AWS Snowball Edge):** Incorrect because Snowball Edge is designed for offline data transfer, not for ongoing replication with minimal downtime. It could be used for initial data load but does not support continuous replication. **Option B (AWS DMS):** Correct. AWS Database Migration Service can perform a full load of the source Oracle database to Amazon RDS for Oracle and then continuously replicate changes using Change Data Capture (CDC) to minimize downtime and ensure consistency. **Option C (AWS DataSync):** Incorrect because DataSync is used for file-based data transfers (e.g., NFS/SMB shares), not for database replication. **Option D (AWS SCT):** Incorrect because the Schema Conversion Tool only converts database schemas and code; it does not handle data migration or replication.
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 Edge
Why it's wrong here
Incorrect because Snowball Edge is for offline data transfer, not for ongoing replication.
- ✓
AWS Database Migration Service (DMS)
Why this is correct
Correct because DMS can perform full load and ongoing replication (CDC) to minimize downtime.
- ✗
AWS DataSync
Why it's wrong here
Incorrect because DataSync is for file-based transfers, not database replication.
- ✗
AWS Schema Conversion Tool (SCT)
Why it's wrong here
Incorrect because SCT only converts schemas, it does not handle data migration or replication.
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