PCDOE Managing service incidents Practice Question
This PCDOE practice question tests your understanding of managing service incidents. 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.
Your team receives an alert that the Error Reporting count for a critical service has increased tenfold in the last 10 minutes. You suspect a recent code deployment is the cause. What is the first action you should take?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Roll back the deployment to the previous version.
A tenfold increase in error reporting within 10 minutes strongly indicates a recent code deployment introduced a critical bug. The immediate priority is to restore service stability by rolling back the deployment to the previous known-good version, as this directly mitigates the root cause. Delaying the rollback risks further degradation of the service and potential data loss or corruption.
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.
✗
Disable the alert to reduce noise.
Why it's wrong here
Disabling alerts ignores the problem and delays response.
✓
Roll back the deployment to the previous version.
Why this is correct
Rolling back quickly mitigates user impact.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the instance count to handle the load.
Why it's wrong here
Scaling up may help but does not address the root cause (buggy code).
✗
Open a post-mortem to document the incident.
Why it's wrong here
Post-mortem is important but not the first action; containment comes first.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the candidate's ability to prioritize immediate incident response over long-term analysis, trapping those who confuse 'post-mortem' (a retrospective activity) with 'first action' (a corrective action).
Detailed technical explanation
How to think about this question
In a Kubernetes or containerized environment, a rollback can be executed using `kubectl rollout undo deployment/<name>` to revert to the previous ReplicaSet. This command leverages the built-in revision history maintained by the Deployment controller, which stores the last several ReplicaSet templates. The rollback is atomic and can be completed in seconds, whereas scaling up instances (Option C) would only increase the error count proportionally if the bug is triggered on every request.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Managing service incidents — This question tests Managing service incidents — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Roll back the deployment to the previous version. — A tenfold increase in error reporting within 10 minutes strongly indicates a recent code deployment introduced a critical bug. The immediate priority is to restore service stability by rolling back the deployment to the previous known-good version, as this directly mitigates the root cause. Delaying the rollback risks further degradation of the service and potential data loss or corruption.
What should I do if I get this PCDOE 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: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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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