Google PCA Ensure solution and operations reliability Practice Question
This PCA practice question tests your understanding of ensure solution and operations reliability. 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.
You are responsible for incident management for a production service. You want to reduce manual toil during the initial response to common issues like high latency. What is the best approach?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Cloud Monitoring to trigger a Cloud Function that performs automated checks and rolls back the last deployment if latency spikes.
Option A is correct because it directly reduces manual toil by automating the initial response to common issues like high latency. Cloud Monitoring triggers a Cloud Function that performs automated checks and, if latency spikes, rolls back the last deployment, eliminating the need for human intervention during the critical first response phase.
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 Monitoring to trigger a Cloud Function that performs automated checks and rolls back the last deployment if latency spikes.
Why this is correct
Automated actions reduce manual toil and speed up response.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set up Cloud Monitoring alerts with email notifications to the on-call engineer.
Why it's wrong here
Alerts still require manual response.
✗
Create detailed runbooks and require the on-call to follow them step by step.
Why it's wrong here
Runbooks are manual processes.
✗
Enable Cloud Logging and set up a custom dashboard for the on-call.
Why it's wrong here
Dashboards provide visibility but do not automate response.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between 'alerting' (which still requires manual action) and 'automated remediation' (which reduces toil), so candidates mistakenly choose options that provide visibility or documentation instead of automation.
Detailed technical explanation
How to think about this question
Cloud Monitoring can use alerting policies with a 'Webhook' or 'Pub/Sub' notification channel to trigger a Cloud Function. The Cloud Function can query the deployment manager API or use Cloud Build to revert to a previous known-good artifact, ensuring rollback is atomic and auditable. In a real-world scenario, this pattern is critical for services with strict SLOs, as it can reduce mean time to recovery (MTTR) from minutes to seconds.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Ensure solution and operations reliability — This question tests Ensure solution and operations reliability — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Cloud Monitoring to trigger a Cloud Function that performs automated checks and rolls back the last deployment if latency spikes. — Option A is correct because it directly reduces manual toil by automating the initial response to common issues like high latency. Cloud Monitoring triggers a Cloud Function that performs automated checks and, if latency spikes, rolls back the last deployment, eliminating the need for human intervention during the critical first response phase.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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