PCDOE Building and implementing CI/CD pipelines Practice Question
This PCDOE practice question tests your understanding of building and implementing ci/cd pipelines. 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 team is using Cloud Build to build and deploy to multiple environments (dev, staging, prod) using Cloud Deploy. They want to ensure that only builds from the main branch are promoted to prod. How should they configure this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a Cloud Deploy promotion with an approval gate required for the prod target.
Option D is correct because Cloud Deploy's approval gate feature allows you to require manual approval before a release is promoted to a specific target, such as prod. By configuring an approval gate on the prod target, you ensure that only builds from the main branch (which can be verified via the release metadata or source) are manually approved for promotion, providing a controlled, auditable gate. This approach directly enforces the branch-based promotion policy without relying on build-time filtering or IAM restrictions.
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 Cloud Build tags to mark builds from the main branch and filter in Cloud Deploy.
Why it's wrong here
Cloud Deploy doesn't filter releases by build tags.
✗
Set IAM policies on the Container Registry or Artifact Registry to restrict access to the prod image.
Why it's wrong here
Doesn't stop a release from being created and promoted from any branch.
✗
Set the Cloud Build trigger to only run on the main branch.
Why it's wrong here
That triggers builds only from main, but doesn't prevent deploying non-main artifacts if they are released.
✓
Configure a Cloud Deploy promotion with an approval gate required for the prod target.
Why this is correct
Approval gating prevents automatic promotion to prod.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that a Cloud Build trigger restriction alone is sufficient to control promotions, but the trigger only controls build creation, not the subsequent deployment promotion, which requires a separate gate like an approval gate in Cloud Deploy.
Detailed technical explanation
How to think about this question
Cloud Deploy uses delivery pipelines with targets, and each target can have an approval gate defined in the pipeline YAML under the `requireApproval` field. When a release is created from a Cloud Build run, the release includes the source branch in its metadata; the approval gate allows a human reviewer to inspect the release details (including the source branch) before approving promotion to prod. This mechanism integrates with Cloud Audit Logs for compliance, ensuring every promotion is recorded and traceable.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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.
Building and implementing CI/CD pipelines — This question tests Building and implementing CI/CD pipelines — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure a Cloud Deploy promotion with an approval gate required for the prod target. — Option D is correct because Cloud Deploy's approval gate feature allows you to require manual approval before a release is promoted to a specific target, such as prod. By configuring an approval gate on the prod target, you ensure that only builds from the main branch (which can be verified via the release metadata or source) are manually approved for promotion, providing a controlled, auditable gate. This approach directly enforces the branch-based promotion policy without relying on build-time filtering or IAM restrictions.
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.
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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