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 media company uses Cloud Bigtable to serve user recommendations with low latency. They want to implement disaster recovery with a secondary cluster in a different region. They need automatic failover without manual DNS changes. Which routing policy should they configure?
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
✓
Configure read-failover routing policy and use Cloud DNS health checks
The read-failover policy uses health checks to automatically route traffic to the secondary cluster if the primary becomes unhealthy. Any-replica sends requests to the closest cluster regardless of health. Manual DNS changes would be required for any-replica after a failure. Application-managed routing is not a built-in Bigtable feature.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable any-replica routing policy on the Bigtable cluster
Why it's wrong here
Any-replica routes to the closest healthy cluster but does not automatically failover; it still requires DNS routing changes if the primary fails.
- ✗
Use single-cluster routing with manual DNS failover
Why it's wrong here
Manual DNS changes are not automatic; the requirement is automatic failover.
- ✗
Implement application-managed routing with a custom health check
Why it's wrong here
Application-managed routing is not a built-in Bigtable feature; it would require custom code and complexity.
- ✓
Configure read-failover routing policy and use Cloud DNS health checks
Why this is correct
read-failover with health checks enables automatic failover to the secondary cluster without manual DNS updates, meeting the requirement.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCDE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCDE exam.