This PCA practice question tests your understanding of managing implementation and ensuring solution and operations reliability. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 configuring a Cloud Monitoring alerting policy to notify your SRE team when the error rate of a service exceeds 5% over a 5-minute window. Which type of metric evaluation should you use?
Window-based
Window-based metrics evaluate conditions over a sliding time window.
Log-based
Why wrong: Log-based alerts are for specific log entries, not metric thresholds.
Request-based
Why wrong: Request-based is for latency SLOs, not error rate over a window.
Health check-based
Why wrong: Health checks are for instance-level availability, not error rate.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Window-based
A window-based metric evaluation (e.g., rate, ratio, or count over a sliding window) is appropriate for error rate over a 5-minute window. Request-based is for latency SLOs.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Window-based
Why this is correct
Window-based metrics evaluate conditions over a sliding time window.
Related concept
Read the scenario before looking for a memorised answer.
Log-based
Why it's wrong here
Log-based alerts are for specific log entries, not metric thresholds.
Request-based
Why it's wrong here
Request-based is for latency SLOs, not error rate over a window.
Health check-based
Why it's wrong here
Health checks are for instance-level availability, not error rate.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which PCA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Managing Implementation and Ensuring Solution and Operations Reliability — This question tests Managing Implementation and Ensuring Solution and Operations Reliability — Read the scenario before looking for a memorised answer..
The correct answer is: Window-based — A window-based metric evaluation (e.g., rate, ratio, or count over a sliding window) is appropriate for error rate over a 5-minute window. Request-based is for latency SLOs.
Identify which PCA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This PCA 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 PCA exam.
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