DEA-C01 Data Operations and Support Practice Question
A company uses AWS DMS to migrate data from an on-premises Oracle database to Amazon Aurora MySQL. After the migration, the data in Aurora is inconsistent with the source. The engineer needs to ensure ongoing replication with minimal downtime. Which solution should the engineer implement?
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
✓
Configure a DMS task with change data capture (CDC)
Configuring a DMS task with Change Data Capture (CDC) enables ongoing replication of changes from the source Oracle database to the target Aurora MySQL database with minimal downtime, ensuring consistency. Option A is incorrect because AWS Schema Conversion Tool (SCT) only converts schema and does not handle data replication. Option B is incorrect because mysqldump provides a one-time export/import, not ongoing replication. Option D is incorrect because performing a full load migration again would disrupt operations and would not capture ongoing changes.
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 convert the schema
Why it's wrong here
Only converts schema, not data.
- ✗
Export the data from Oracle and import into Aurora using mysqldump
Why it's wrong here
One-time, not ongoing.
- ✓
Configure a DMS task with change data capture (CDC)
Why this is correct
CDC captures ongoing changes.
- ✗
Perform a full load migration again
Why it's wrong here
Does not provide ongoing replication.
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