DBS-C01 Deployment and Migration Practice Question
Network Topology
Refer to the exhibit. A DBA is monitoring a DMS migration task from on-premises Oracle to Amazon RDS for Oracle. The full load completed successfully with 50 tables. However, the DBA notices that the CDC phase has not started. What is the most likely reason?
⚠ Common exam trap
Watch out — candidates often assume CDC automatically starts after full load, but AWS DMS requires the task to remain in a running state; stopping the task halts the transition to CDC, and this is a common oversight in migration planning.
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
✓
The replication task was stopped after the full load completed
The most likely reason the CDC phase has not started is that the replication task was stopped after the full load completed. In AWS DMS, after the full load finishes, the task must remain in a running state to transition to the CDC phase. If the task is stopped, CDC cannot begin, and the DBA would need to resume or restart the task to 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.
- ✗
The task was not configured with CDC enabled
Why it's wrong here
If CDC were not enabled, the task would not have a CDC phase, but the exhibit does not indicate that.
- ✗
The full load encountered errors on some tables
Why it's wrong here
TablesErrored is 0, so no errors.
- ✗
The source Oracle database is not generating redo logs
Why it's wrong here
Even if redo logs are generated, the task must be running to capture them.
- ✓
The replication task was stopped after the full load completed
Why this is correct
The StopDate is set, indicating the task stopped before CDC could begin.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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