Google PCA Manage implementation of cloud architecture Practice Question
This PCA practice question tests your understanding of manage implementation of cloud architecture. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 multinational corporation has deployed a web application across multiple Google Cloud regions using an external HTTPS load balancer with backend services in each region. They recently added a new region (asia-southeast1) and updated the load balancer configuration. After the update, some users in that region report high latency and occasional connection timeouts when accessing the application. The load balancer health checks show all backends as healthy. The network team confirms that the backend instances in asia-southeast1 are correctly configured and can be accessed directly via their external IPs. What should the architects investigate next?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Review the Cloud Armor security policy rules that might be blocking traffic from that region
Option D is correct because Cloud Armor security policies can block traffic based on geographic location. If the new region (asia-southeast1) was added but the Cloud Armor policy was not updated to allow traffic from that region, requests from users in asia-southeast1 could be denied or rate-limited, causing high latency and timeouts even though health checks (which originate from Google's health check ranges, not user IPs) show backends as healthy. The direct access via external IPs works because it bypasses the load balancer and its associated Cloud Armor policy.
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.
✗
Check the Cloud CDN cache settings for the new region
Why it's wrong here
Cloud CDN does not cause timeouts for dynamic requests.
✗
Verify that the backend service in asia-southeast1 has the correct timeout settings for the load balancer
Why it's wrong here
Timeout settings are global; would affect all regions.
✗
Ensure that the firewall rules allow traffic from the load balancer's health check ranges to the instances
Why it's wrong here
Health checks are healthy, so firewall for health checks is not the issue.
✓
Review the Cloud Armor security policy rules that might be blocking traffic from that region
Why this is correct
Cloud Armor geo-filtering may block traffic from that region while allowing health checks from Google IPs.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that health check success implies full end-to-end connectivity, but health checks bypass Cloud Armor and firewall rules that apply to user traffic, so healthy backends do not guarantee user traffic is allowed.
Detailed technical explanation
How to think about this question
Cloud Armor security policies are evaluated at the Google Cloud edge before traffic reaches the backend. When a new region is added, the load balancer's frontend IPs in that region must be allowed by the policy; if the policy uses geographic-based deny rules (e.g., deny all traffic not from specific regions), users in the new region may be blocked. Health checks bypass Cloud Armor because they originate from Google's internal ranges (e.g., 35.191.0.0/16, 130.211.0.0/22), so they remain healthy even when user traffic is denied.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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: Review the Cloud Armor security policy rules that might be blocking traffic from that region — Option D is correct because Cloud Armor security policies can block traffic based on geographic location. If the new region (asia-southeast1) was added but the Cloud Armor policy was not updated to allow traffic from that region, requests from users in asia-southeast1 could be denied or rate-limited, causing high latency and timeouts even though health checks (which originate from Google's health check ranges, not user IPs) show backends as healthy. The direct access via external IPs works because it bypasses the load balancer and its associated Cloud Armor policy.
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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