Google PCA Practice Question: Analyze and optimize technical and business processes
This PCA practice question tests your understanding of analyze and optimize technical and business processes. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A financial services company needs a disaster recovery plan for a critical application running on GKE. The application uses Cloud SQL for MySQL. The RPO is 5 minutes and RTO is 15 minutes. Which design meets these requirements cost-effectively?
Use Cloud SQL cross-region replication (MySQL) with a failover replica in another region, and deploy GKE cluster in that region with the same configuration.
Cross-region replication can meet 5 min RPO.
B
Use Cloud SQL for MySQL with multi-region database flag and route traffic to nearest region via Cloud Load Balancing.
Why wrong: Multi-region flag is for read replicas, not failover.
C
Set up VPC peering between two regions and use Cloud DNS to direct traffic in failover.
Why wrong: Doesn't address database replication.
D
Use Cloud SQL backups to Cloud Storage and restore in another region, with GKE cluster recreated via Deployment Manager.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Cloud SQL cross-region replication (MySQL) with a failover replica in another region, and deploy GKE cluster in that region with the same configuration.
Cloud SQL cross-region replication provides an asynchronous replica in another region with a typical replication lag of a few seconds, meeting the 5-minute RPO. The failover replica can be promoted in minutes, and deploying a GKE cluster in the same region with identical configuration allows the application to connect to the promoted replica, achieving the 15-minute RTO. This approach is cost-effective because you only pay for the replica and the second GKE cluster when needed for failover testing or actual disaster recovery.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 Cloud SQL cross-region replication (MySQL) with a failover replica in another region, and deploy GKE cluster in that region with the same configuration.
Why this is correct
Cross-region replication can meet 5 min RPO.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Cloud SQL for MySQL with multi-region database flag and route traffic to nearest region via Cloud Load Balancing.
Why it's wrong here
Multi-region flag is for read replicas, not failover.
✗
Set up VPC peering between two regions and use Cloud DNS to direct traffic in failover.
Why it's wrong here
Doesn't address database replication.
✗
Use Cloud SQL backups to Cloud Storage and restore in another region, with GKE cluster recreated via Deployment Manager.
Why it's wrong here
Backup restore RPO can be hours.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Cloud SQL's cross-region replication with Cloud Spanner's multi-region configuration, or assume that network-level solutions like VPC peering and DNS can satisfy data replication requirements without a dedicated database replication mechanism.
Detailed technical explanation
How to think about this question
Cloud SQL cross-region replication uses asynchronous replication based on MySQL's binary log (binlog) position, with a typical lag of 1-5 seconds under normal load, but can increase under heavy write traffic. The failover replica in the secondary region is a read replica that can be promoted to a primary instance; the promotion process involves stopping replication, applying any remaining binlog events, and making the instance writable, which usually completes within a few minutes. For the GKE cluster, you must ensure the application's connection string or service discovery mechanism points to the new primary's IP or DNS name, often managed via a Cloud DNS failover routing policy or a simple configuration update.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Analyze and optimize technical and business processes — This question tests Analyze and optimize technical and business processes — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Cloud SQL cross-region replication (MySQL) with a failover replica in another region, and deploy GKE cluster in that region with the same configuration. — Cloud SQL cross-region replication provides an asynchronous replica in another region with a typical replication lag of a few seconds, meeting the 5-minute RPO. The failover replica can be promoted in minutes, and deploying a GKE cluster in the same region with identical configuration allows the application to connect to the promoted replica, achieving the 15-minute RTO. This approach is cost-effective because you only pay for the replica and the second GKE cluster when needed for failover testing or actual disaster recovery.
What should I do if I get this PCA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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