Google PCA Manage implementation of cloud architecture Practice Question
This PCA practice question tests your understanding of manage implementation of cloud architecture. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which THREE of the following are recommended practices when designing a highly available architecture on Google Cloud using multiple regions?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a global external HTTP(S) load balancer with backend services in multiple regions
Option B is correct because a global external HTTP(S) load balancer uses Google's global anycast IP and routes traffic to the closest healthy backend in any region, enabling cross-region failover and low latency. It automatically handles failover between regions when health checks detect backend failures, making it a core component of multi-region high availability.
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.
✗
Deploy Compute Engine instances in a single regional managed instance group
Why it's wrong here
Single region does not protect against regional failure.
✓
Use a global external HTTP(S) load balancer with backend services in multiple regions
Why this is correct
Routes traffic to the nearest healthy backend, providing multi-region HA.
Related concept
Read the scenario before looking for a memorised answer.
✓
Use Cloud Spanner or cross-region replication for databases
Why this is correct
Provides data replication and consistency across regions.
Related concept
Read the scenario before looking for a memorised answer.
✓
Implement health checks and automated failover using Cloud DNS with weighted routing
Why this is correct
Health-checked DNS with weighted routing can direct traffic away from unhealthy regions.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use a single Cloud VPN tunnel for connectivity between regions
Why it's wrong here
Single VPN is a single point of failure; use redundant tunnels.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that a single regional managed instance group or a single VPN tunnel is sufficient for multi-region high availability, but the exam expects you to recognize that redundancy across regions and elimination of single points of failure are mandatory.
Detailed technical explanation
How to think about this question
Global external HTTP(S) load balancers are built on Google Front End (GFE) infrastructure, which uses Anycast IPs to direct traffic to the nearest GFE. The load balancer supports cross-region backend services with health checks that probe instances every 5 seconds (configurable) and can automatically drain traffic from unhealthy backends. In a real-world scenario, if a regional backend group becomes unhealthy, the load balancer reroutes traffic to other regions within seconds, but note that existing connections to unhealthy instances may be dropped unless you configure connection draining.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Manage implementation of cloud architecture — This question tests Manage implementation of cloud architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a global external HTTP(S) load balancer with backend services in multiple regions — Option B is correct because a global external HTTP(S) load balancer uses Google's global anycast IP and routes traffic to the closest healthy backend in any region, enabling cross-region failover and low latency. It automatically handles failover between regions when health checks detect backend failures, making it a core component of multi-region high availability.
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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