- A
Configure Cloud Deploy with a canary strategy and metric thresholds
Cloud Deploy can automate canary progression with metrics and rollback.
- B
Use tags on the new revision for testing without affecting traffic
Tags allow testing the new revision directly via URL.
- C
Use gcloud run deploy with --no-traffic to deploy the new revision without receiving traffic
Why wrong: This would not send any traffic to the new revision.
- D
Use gcloud run deploy with --to-revisions to split traffic, e.g., NEW=10, OLD=90
This implements the initial canary traffic split.
- E
Use a manual approval gate in Cloud Deploy
Why wrong: Manual gate is not needed if automation is required, but could be used; however, the question asks for three configurations, and tag + traffic split + Cloud Deploy are the key.
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 DevOps engineer is designing a CI/CD pipeline for a Cloud Run service. They need to implement a canary deployment that sends 10% of traffic to a new revision initially, then gradually increases to 100% if metrics are healthy. They also need to roll back instantly if the canary fails. Which THREE configurations should they use? (Select THREE)
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 Cloud Deploy with a canary strategy and metric thresholds
Option A is correct because Cloud Deploy supports canary deployments with automated metric thresholds (e.g., latency, error rate) that control traffic progression. This allows the pipeline to gradually shift from 10% to 100% traffic based on real-time health checks, enabling automated rollback if thresholds are breached.
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 Cloud Deploy with a canary strategy and metric thresholds
Why this is correct
Cloud Deploy can automate canary progression with metrics and rollback.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use tags on the new revision for testing without affecting traffic
Why this is correct
Tags allow testing the new revision directly via URL.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use gcloud run deploy with --no-traffic to deploy the new revision without receiving traffic
Why it's wrong here
This would not send any traffic to the new revision.
- ✓
Use gcloud run deploy with --to-revisions to split traffic, e.g., NEW=10, OLD=90
Why this is correct
This implements the initial canary traffic split.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use a manual approval gate in Cloud Deploy
Why it's wrong here
Manual gate is not needed if automation is required, but could be used; however, the question asks for three configurations, and tag + traffic split + Cloud Deploy are the key.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between deploying a revision without traffic (Option C) and implementing a fully automated canary with metric-based progression (Option A), where candidates mistakenly think `--no-traffic` alone satisfies the gradual increase requirement.
Detailed technical explanation
How to think about this question
Cloud Deploy's canary strategy uses a `canaryDeployment` configuration with `percentages` (e.g., [10, 50, 100]) and `metricThresholds` referencing Cloud Monitoring metrics like `serviceruntime.googleapis.com/api/request_count/error_fraction`. Under the hood, it creates multiple Cloud Run revisions and uses traffic splitting via the `spec.traffic` field, where each step updates the revision weights. In a real-world scenario, if error rates spike at 10% traffic, Cloud Deploy automatically rolls back to the previous revision without manual intervention, ensuring zero downtime.
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 Cloud Deploy with a canary strategy and metric thresholds — Option A is correct because Cloud Deploy supports canary deployments with automated metric thresholds (e.g., latency, error rate) that control traffic progression. This allows the pipeline to gradually shift from 10% to 100% traffic based on real-time health checks, enabling automated rollback if thresholds are breached.
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.
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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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