Question 143 of 1,446
PCDE Migrate data solutions Practice Question
After promoting a Cloud SQL destination in a DMS continuous migration, the application team updates the connection strings. However, they want a rollback plan in case issues arise. What should they keep running to allow a rollback?
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
✓
Keep the source database running in read-only mode
Keeping the source database running (read-only) allows reverting to it if needed. The DMS job is stopped after promotion. The destination is now the primary. Keeping both writable could cause conflicts.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Keep both databases writable
Why it's wrong here
This could lead to data divergence and conflicts.
- ✗
Keep the destination database in read-only mode
Why it's wrong here
The destination needs to be writable for the application.
- ✗
Keep the DMS job active
Why it's wrong here
DMS job is typically stopped after promotion; keeping it could cause issues.
- ✓
Keep the source database running in read-only mode
Why this is correct
This allows rolling back to the source without data divergence.
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Last reviewed: Jul 4, 2026
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