- A
Use a blue/green strategy instead, as it supports automatic rollback
Why wrong: Blue/green does not inherently support automatic rollback.
- B
Configure a canary deployment strategy in the delivery pipeline with phases and metrics
This sets up the canary with metric thresholds.
- C
Delegate rollback to the developer who must manually approve or reject
Why wrong: Manual rollback does not automate based on metrics.
- D
Create a Cloud Monitoring alert policy that triggers a Cloud Deploy rollback via a webhook
This enables automatic rollback based on error rate.
- E
Set up a preDeploy hook to run a load test
Why wrong: Load test does not monitor error rate during canary.
Question 424 of 1,000
PCDE Practice Question: Building and Implementing CI/CD Pipelines for a Service
This PCDE practice question tests your understanding of building and implementing ci/cd pipelines for a service. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 company uses Cloud Deploy for a CD pipeline to Cloud Run. They want to implement a canary deployment that automatically rolls back if the error rate increases by more than 5% during the canary phase. Which TWO actions should they take?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a canary deployment strategy in the delivery pipeline with phases and metrics
Option B is correct because Cloud Deploy's canary strategy allows you to define phases with specific metrics (e.g., error rate) that are evaluated during the rollout. If the error rate exceeds the defined threshold (e.g., 5% increase), Cloud Deploy automatically rolls back the canary without manual intervention. This is configured in the delivery pipeline YAML under the `strategy` section with `canary` and `phases`.
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 a blue/green strategy instead, as it supports automatic rollback
Why it's wrong here
Blue/green does not inherently support automatic rollback.
- ✓
Configure a canary deployment strategy in the delivery pipeline with phases and metrics
Why this is correct
This sets up the canary with metric thresholds.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Delegate rollback to the developer who must manually approve or reject
Why it's wrong here
Manual rollback does not automate based on metrics.
- ✓
Create a Cloud Monitoring alert policy that triggers a Cloud Deploy rollback via a webhook
Why this is correct
This enables automatic rollback based on error rate.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Set up a preDeploy hook to run a load test
Why it's wrong here
Load test does not monitor error rate during canary.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that blue/green strategies support automatic rollback based on metrics, but in Cloud Deploy, canary strategies are the only ones that natively integrate with Cloud Monitoring for automated rollback decisions.
Detailed technical explanation
How to think about this question
Cloud Deploy uses the `canaryDeployment` strategy with `phases` where each phase can specify a `percentage` and `metrics` like `error_rate` from Cloud Monitoring. The rollback is triggered by a Cloud Monitoring alert policy that sends a webhook to Cloud Deploy's `rollback` API endpoint, which requires the alert to be configured with the correct payload and authentication. In practice, you must ensure the alert policy's filter matches the Cloud Run service revision and the metric threshold is set to '5% increase' relative to the baseline.
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.
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Building and Implementing CI/CD Pipelines for a Service — study guide chapter
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FAQ
Questions learners often ask
What does this PCDE question test?
Building and Implementing CI/CD Pipelines for a Service — This question tests Building and Implementing CI/CD Pipelines for a Service — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure a canary deployment strategy in the delivery pipeline with phases and metrics — Option B is correct because Cloud Deploy's canary strategy allows you to define phases with specific metrics (e.g., error rate) that are evaluated during the rollout. If the error rate exceeds the defined threshold (e.g., 5% increase), Cloud Deploy automatically rolls back the canary without manual intervention. This is configured in the delivery pipeline YAML under the `strategy` section with `canary` and `phases`.
What should I do if I get this PCDE 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.
About these practice questions
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Last reviewed: Jul 4, 2026
This PCDE 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 PCDE exam.
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