DBS-C01 Deployment and Migration Practice Question
A company is migrating a 500 GB Oracle database to Amazon Aurora PostgreSQL. They need to convert the schema and migrate the data with minimal downtime. Which THREE actions should they take? (Choose three.)
⚠ Common exam trap
Test-takers frequently think Snowball Edge is suitable for any database migration size, but for sub-10 TB databases with minimal downtime requirements, DMS with CDC is the correct approach, and Snowball is overkill and introduces latency.
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
✓
Use AWS Schema Conversion Tool (SCT) to assess and convert Oracle-specific features like hierarchical queries.
AWS Schema Conversion Tool (SCT) is the correct tool for assessing and converting Oracle-specific features like hierarchical queries (e.g., CONNECT BY) into PostgreSQL-compatible syntax (e.g., recursive CTEs). This is essential for schema migration to Aurora PostgreSQL, and SCT provides a detailed assessment report to identify and automate conversion of such features.
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 (SCT) to assess and convert Oracle-specific features like hierarchical queries.
Why this is correct
SCT can convert Oracle-specific features to PostgreSQL equivalents.
- ✗
Modify the application to use Aurora PostgreSQL-specific SQL syntax before migration.
Why it's wrong here
Application modification can be done after migration; SCT handles syntax conversion.
- ✓
Use AWS Database Migration Service (DMS) with change data capture (CDC) to migrate data.
Why this is correct
DMS with CDC allows continuous replication with minimal downtime.
- ✓
Use AWS Schema Conversion Tool (SCT) to convert the Oracle schema to PostgreSQL-compatible schema.
Why this is correct
SCT converts Oracle schema, including stored procedures and functions.
- ✗
Use AWS Snowball Edge to transfer the data to AWS and then load into Aurora.
Why it's wrong here
Snowball is for bulk data transfer, not minimal downtime migration.
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