DBS-C01 Deployment and Migration Practice Question
A company is migrating a 1 TB Oracle database to Amazon Aurora PostgreSQL using AWS DMS. They need to ensure minimal downtime and data consistency. Which TWO actions should the company take?
⚠ Common exam trap
Test-takers frequently confuse the AWS Schema Conversion Tool (SCT) with DMS, thinking it is part of the migration process for minimizing downtime, when in fact SCT is used for schema assessment and conversion before migration, not for ongoing replication or consistency checks.
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
✓
Enable change data capture (CDC) on the source Oracle database
Enabling Change Data Capture (CDC) on the source Oracle database allows AWS DMS to capture ongoing changes after the full load, enabling a near-zero downtime migration by continuously replicating transactions to the target Aurora PostgreSQL. Option C is correct because enabling data validation on the DMS task ensures that the data migrated is consistent between the source and target, verifying that no data loss or corruption occurred during the migration process.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the target Aurora storage to 2 TB to avoid storage issues
Why it's wrong here
Storage size is not directly related to minimal downtime or consistency.
- ✓
Enable change data capture (CDC) on the source Oracle database
Why this is correct
CDC captures ongoing changes to minimize downtime.
- ✓
Enable data validation on the DMS task
Why this is correct
Validation ensures data consistency.
- ✗
Disable foreign key constraints on the target during migration
Why it's wrong here
May be helpful but not mandatory; not a required action for all migrations.
- ✗
Use AWS Schema Conversion Tool to convert the schema
Why it's wrong here
SCT is for schema conversion before migration, not during migration.
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