This PCD practice question tests your understanding of deploying applications. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Network Topology
A developer runs the command above and receives the error. The developer has just been granted the 'roles/cloudbuild.builds.editor' role on the project. What is the most likely reason for the permission error?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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 API is not enabled for the project.
The error occurs because the Cloud Build API has not been enabled for the project. Even with the 'roles/cloudbuild.builds.editor' IAM role, the Cloud Build service itself must be explicitly enabled via the Google Cloud Console or using the `gcloud services enable cloudbuild.googleapis.com` command. Without enabling the API, any attempt to run a build will fail with a permission error, as the service is not available to process the request.
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 project ID 'my-project' does not exist or the developer typed it incorrectly.
Why it's wrong here
The error says 'or it may not exist', but the message indicates permission denial, likely API not enabled.
✗
The container registry (gcr.io) is incorrect; should use us.gcr.io.
Why it's wrong here
gcr.io is a valid multi-regional registry.
✓
The Cloud Build API is not enabled for the project.
Why this is correct
Correct: If the API is not enabled, even with proper IAM roles, the call is denied.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The developer is using the wrong region; Cloud Build must be enabled per region.
Why it's wrong here
Cloud Build is a global service and does not need region-specific enablement.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between IAM role assignments and API enablement, as candidates may assume that granting a role automatically enables the underlying service, which is not the case in Google Cloud.
Detailed technical explanation
How to think about this question
Under the hood, Google Cloud services require API enablement to activate the service backend for a project. The IAM role 'roles/cloudbuild.builds.editor' grants permissions to create and manage builds, but the Cloud Build API must be enabled to allow the service to accept and execute build requests. In a real-world scenario, a common mistake is to assign IAM roles without enabling the corresponding API, leading to confusing 'permission denied' errors that are actually due to the service not being activated. The `gcloud services list --enabled` command can be used to verify which APIs are enabled.
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.
Deploying applications — This question tests Deploying applications — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The Cloud Build API is not enabled for the project. — The error occurs because the Cloud Build API has not been enabled for the project. Even with the 'roles/cloudbuild.builds.editor' IAM role, the Cloud Build service itself must be explicitly enabled via the Google Cloud Console or using the `gcloud services enable cloudbuild.googleapis.com` command. Without enabling the API, any attempt to run a build will fail with a permission error, as the service is not available to process the request.
What should I do if I get this PCD question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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