Question 126 of 1,446
Deploy scalable and highly available databases in Google Cloud →mediumMultiple ChoiceObjective-mapped
PCDE Practice Question: Deploy scalable and highly available databases in Google Cloud
A healthcare company uses Cloud SQL for PostgreSQL and needs to meet a disaster recovery requirement of RPO = 1 hour and RTO = 2 hours for a cross-region failover. They currently have a cross-region read replica in another region. Which additional action should they take to meet the RPO consistently?
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
✓
Set up monitoring and alerting on the replication lag metric
Cross-region read replicas have asynchronous replication lag, which can vary. To ensure that the RPO is bounded to 1 hour, the company must monitor the replication lag and alert if it exceeds 1 hour. They can also increase the replica's resources to reduce lag, but monitoring is essential to guarantee the RPO.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure the read replica to use synchronous replication
Why it's wrong here
Cross-region replicas only support asynchronous replication due to latency.
- ✗
Increase the replica's storage capacity
Why it's wrong here
Storage capacity does not directly affect replication lag; CPU/memory might help but monitoring is the key to verifying RPO.
- ✓
Set up monitoring and alerting on the replication lag metric
Why this is correct
Monitoring the replication lag ensures that if the lag approaches 1 hour, the team can take corrective action to maintain the RPO.
- ✗
Enable point-in-time recovery on the primary instance
Why it's wrong here
PITR helps with RPO but only for the primary instance, not for the replica.
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Last reviewed: Jul 4, 2026
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