PCDE Migrate data solutions Practice Question

A company is migrating a PostgreSQL database to Cloud SQL using DMS continuous migration. After the full dump, the CDC phase is replicating changes. To prepare for cutover, which TWO actions should the engineer take? (Choose 2)

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

✓

Verify that the DMS migration job lag is 0 seconds.

Quiesce writes to ensure no new changes, and confirm DMS lag is 0 before promoting.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
Verify that the DMS migration job lag is 0 seconds.
Why this is correct
Ensures source and target are in sync.
✗
Enable binary logging on the source.
Why it's wrong here
Binary logging should already be enabled for CDC.
✗
Take a full backup of the source.
Why it's wrong here
Not needed; DMS already replicated data.
✗
Delete the DMS migration job to stop replication.
Why it's wrong here
Do not delete; need to promote first.
✓
Quiesce all write operations to the source database.
Why this is correct
Stops new changes so lag can reach zero.

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Last reviewed: Jul 4, 2026

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