The answer is that the build exceeds the default Cloud Build timeout, which is the most likely cause of the intermittent 'Failed to trigger build: Build timed out' error. Cloud Build imposes a default timeout of 10 minutes for each build step; if your process—such as pulling large dependencies or building a container image—takes longer, the service automatically terminates the build, leading to this failure. On the Google Professional Cloud Developer exam, this scenario tests your understanding of Cloud Build’s default limits and how to adjust them for long-running deployments. A common trap is assuming the error indicates a network or permission issue, but the intermittent nature points directly to a duration problem. To fix it, increase the timeout in your build configuration file or switch to a larger machine type for faster execution. Memory tip: think of the 10-minute default as a "ten-minute timer"—if your build runs past it, the timeout triggers.
PCD Building and testing applications Practice Question
This PCD practice question tests your understanding of building and testing applications. 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 containerized application to Cloud Run. The build step fails intermittently with the error 'Failed to trigger build: Build timed out'. What is the most likely cause?
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 build exceeds the default Cloud Build timeout.
The error 'Failed to trigger build: Build timed out' indicates that the Cloud Build execution exceeded the maximum allowed duration. By default, Cloud Build has a timeout of 10 minutes for build steps. If the build process (e.g., pulling dependencies, building the container image) takes longer than this default timeout, the build is automatically terminated, resulting in this intermittent failure. Increasing the timeout in the build configuration or using a larger machine type can resolve this.
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 exceeds the default Cloud Build timeout.
Why this is correct
Default timeout is 10 minutes; exceeding it causes build timeout.
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 build machine has insufficient memory.
Why it's wrong here
Insufficient memory causes OOM, not timeout.
✗
The Dockerfile contains invalid syntax.
Why it's wrong here
Invalid syntax causes build failure, not timeout.
✗
The Cloud Build service account lacks permissions to deploy to Cloud Run.
Why it's wrong here
Permission issues cause access denied errors.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between timeout errors and resource or permission errors, so candidates mistakenly attribute a timeout to insufficient memory or permissions when the error message explicitly points to duration limits.
Detailed technical explanation
How to think about this question
Cloud Build uses a default timeout of 600 seconds (10 minutes) for each build, configurable via the `timeout` field in the build configuration file (cloudbuild.yaml) or the `--timeout` flag in the gcloud command. The timeout applies to the entire build process, including all steps. If the build involves large container images, slow network pulls, or complex multi-step processes, the timeout can be exceeded. Intermittency often occurs due to variable network latency or resource contention in shared build pools. To avoid this, set a higher timeout (e.g., 3600s) or use a private pool with dedicated resources.
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 testing applications — This question tests Building and testing applications — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The build exceeds the default Cloud Build timeout. — The error 'Failed to trigger build: Build timed out' indicates that the Cloud Build execution exceeded the maximum allowed duration. By default, Cloud Build has a timeout of 10 minutes for build steps. If the build process (e.g., pulling dependencies, building the container image) takes longer than this default timeout, the build is automatically terminated, resulting in this intermittent failure. Increasing the timeout in the build configuration or using a larger machine type can resolve this.
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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