DBS-C01 Management and Operations Practice Question
A company is migrating an on-premises Oracle database to Amazon Aurora PostgreSQL. The migration must have minimal downtime and support ongoing replication. Which THREE services should the company use? (Choose 3.)
⚠ Common exam trap
Watch out — candidates often confuse AWS DataSync or Snowball Edge as viable options for database migration with ongoing replication, but these services are for file or bulk data transfer, not for continuous change data capture or schema conversion.
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
✓
Amazon Aurora PostgreSQL
Amazon Aurora PostgreSQL (Option B) is the target database for the migration. The company is migrating from Oracle to Aurora PostgreSQL, so Aurora PostgreSQL is the required destination. AWS DMS (Option D) handles the ongoing replication with minimal downtime by using change data capture (CDC) to continuously replicate changes from the source Oracle database to the target Aurora PostgreSQL. AWS SCT (Option E) is necessary to convert the Oracle database schema and any stored procedures, functions, and other code objects to be compatible with PostgreSQL, as the two databases have different SQL dialects and data types.
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
Snowball is for offline data transfer, not live migration.
- ✓
Amazon Aurora PostgreSQL
Why this is correct
Target database for migration.
- ✗
AWS DataSync
Why it's wrong here
DataSync is for file transfers, not databases.
- ✓
AWS Database Migration Service (AWS DMS)
Why this is correct
DMS supports live migration and ongoing replication.
- ✓
AWS Schema Conversion Tool (AWS SCT)
Why this is correct
SCT converts schema from Oracle to PostgreSQL.
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