PCDOE Building and implementing CI/CD pipelines Practice Question
This PCDOE practice question tests your understanding of building and implementing ci/cd pipelines. 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 Build to deploy a Cloud Run service. The build fails with: 'ERROR: (gcloud.run.services.update) PERMISSION_DENIED: Permission 'run.services.update' denied on resource.' The Cloud Build service account has the Cloud Run Admin role. What is missing?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The Cloud Build service account needs the 'run.services.update' permission or the Cloud Run Admin role.
Option D is correct because the error message explicitly states that the 'run.services.update' permission is denied, which means the Cloud Build service account lacks this specific permission. Although the Cloud Run Admin role includes 'run.services.update', the error indicates the role is not properly assigned or the service account is not using it. Reassigning the Cloud Run Admin role or directly granting the 'run.services.update' permission resolves the issue.
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.
✗
The build config must use the Cloud Run deployer step instead of the gcloud command.
Why it's wrong here
gcloud is fine if permissions are correct.
✗
The Cloud Build service account should have the Owner role on the project.
Why it's wrong here
Overly permissive; Cloud Run Admin is sufficient.
✗
The Cloud Run service must be deployed in the same region as the build.
Why it's wrong here
Region mismatch would produce a different error.
✓
The Cloud Build service account needs the 'run.services.update' permission or the Cloud Run Admin role.
Why this is correct
The error indicates missing permissions; Cloud Run Admin includes it.
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 using a specific step type (like Cloud Run deployer) bypasses IAM requirements, when in fact all deployment methods require the same underlying permissions.
Detailed technical explanation
How to think about this question
Under the hood, Cloud Build uses a service account (default or custom) to execute steps, and each step inherits that account's IAM permissions. The Cloud Run Admin role (roles/run.admin) contains the 'run.services.update' permission, but if the service account is not granted this role at the project level or the resource level, the gcloud command fails with PERMISSION_DENIED. In real-world scenarios, this often occurs when the Cloud Build service account is created but not assigned the role, or when the role is granted on a different resource hierarchy level (e.g., folder instead of project).
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: The Cloud Build service account needs the 'run.services.update' permission or the Cloud Run Admin role. — Option D is correct because the error message explicitly states that the 'run.services.update' permission is denied, which means the Cloud Build service account lacks this specific permission. Although the Cloud Run Admin role includes 'run.services.update', the error indicates the role is not properly assigned or the service account is not using it. Reassigning the Cloud Run Admin role or directly granting the 'run.services.update' permission resolves the issue.
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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