- A
Configure a manual approval gate before promotion
Why wrong: Manual approval gates require human intervention, not automatic rollback.
- B
Set the deployment strategy to blue/green
Why wrong: Blue/green does not automatically roll back; it requires manual cutover.
- C
Set 'rollback-on-failure: true' in the delivery pipeline definition
This enables automatic rollback if the canary deployment fails.
- D
Use a Cloud Build step to run kubectl rollout undo
Why wrong: This is a manual step, not integrated with Cloud Deploy's lifecycle.
Question 88 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. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 team uses Cloud Deploy to manage deployments to GKE. They want to automatically roll back to the previous revision if a canary deployment fails health checks. What should they configure?
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
✓
Set 'rollback-on-failure: true' in the delivery pipeline definition
Cloud Deploy supports automatic rollback on failure for canary deployments by setting `rollback-on-failure: true` in the delivery pipeline definition. When a canary deployment fails health checks, Cloud Deploy automatically reverts to the previous stable revision without manual intervention, ensuring minimal downtime and consistent release governance.
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.
- ✗
Configure a manual approval gate before promotion
Why it's wrong here
Manual approval gates require human intervention, not automatic rollback.
- ✗
Set the deployment strategy to blue/green
Why it's wrong here
Blue/green does not automatically roll back; it requires manual cutover.
- ✓
Set 'rollback-on-failure: true' in the delivery pipeline definition
Why this is correct
This enables automatic rollback if the canary deployment fails.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use a Cloud Build step to run kubectl rollout undo
Why it's wrong here
This is a manual step, not integrated with Cloud Deploy's lifecycle.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse manual approval gates or alternative deployment strategies (like blue/green) with Cloud Deploy's specific `rollback-on-failure` configuration, which is the only built-in mechanism for automatic rollback on canary health check failures.
Detailed technical explanation
How to think about this question
Under the hood, Cloud Deploy's `rollback-on-failure` works by monitoring the canary rollout's health check probes (e.g., readiness or liveness probes) and, upon failure, automatically triggers a rollout undo to the previous revision in the target GKE cluster. This feature is part of Cloud Deploy's progressive delivery model, where the pipeline state machine tracks the canary phase and executes the rollback as a first-class action, ensuring consistency across multiple targets and environments.
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.
Visual reference
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: Set 'rollback-on-failure: true' in the delivery pipeline definition — Cloud Deploy supports automatic rollback on failure for canary deployments by setting `rollback-on-failure: true` in the delivery pipeline definition. When a canary deployment fails health checks, Cloud Deploy automatically reverts to the previous stable revision without manual intervention, ensuring minimal downtime and consistent release governance.
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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