- A
Use a single trigger with a substitution variable like '_BRANCH' and set it to 'main' for integration tests.
Why wrong: Substitutions are set at trigger creation, not at runtime based on branch.
- B
Create one trigger with a build config that uses the 'branchName' substitution to conditionally skip integration test steps.
Why wrong: Cloud Build does not support conditional step skipping based on substitutions.
- C
Create two triggers: one with a branch filter for '^main$' that runs integration tests, and another with a branch filter for '^.*$' that runs unit tests.
Correct: separate triggers with branch filters allow different pipelines per branch.
- D
Configure one trigger with no branch filter and rely on developers to manually trigger integration tests.
Why wrong: Defeats automation; manual triggers are not the intended solution.
Quick Answer
The correct answer is to create two Cloud Build triggers: one with a branch filter of '^main$' for integration tests and another with '^.*$' for unit tests. This configuration works because Cloud Build triggers evaluate branch filters as regular expressions against the pushed branch, allowing you to decouple test execution by branch without embedding conditional logic in a single build file. On the Google Professional Cloud DevOps Engineer exam, this scenario tests your understanding of how to map CI/CD workflows to Cloud Build’s native trigger filtering, often appearing as a trap where candidates try to use a single trigger with inline bash conditionals—a less maintainable approach. The key insight is that separate triggers with precise regex patterns provide clear separation of concerns and align with Infrastructure as Code best practices. Memory tip: think “two triggers, two tests” — the wildcard `.*` catches everything for unit tests, while the anchor `^main$` locks integration tests to the main branch only.
PCDOE Building and implementing CI/CD pipelines Practice Question
This PCDOE practice question tests your understanding of building and implementing ci/cd pipelines. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A development team wants to automatically run unit tests and static code analysis on every push to a Cloud Source Repository, but only run integration tests on merges to the main branch. Which Cloud Build trigger configuration should they use?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Create two triggers: one with a branch filter for '^main$' that runs integration tests, and another with a branch filter for '^.*$' that runs unit tests.
Option C is correct because Cloud Build triggers allow you to define separate triggers with branch filters to execute different build configurations based on the branch. By creating one trigger with a branch filter of '^main$' for integration tests and another with '^.*$' for unit tests, you ensure unit tests run on every push to any branch, while integration tests run only on merges to main. This approach directly maps the desired behavior without requiring conditional logic or manual intervention.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use a single trigger with a substitution variable like '_BRANCH' and set it to 'main' for integration tests.
Why it's wrong here
Substitutions are set at trigger creation, not at runtime based on branch.
- ✗
Create one trigger with a build config that uses the 'branchName' substitution to conditionally skip integration test steps.
Why it's wrong here
Cloud Build does not support conditional step skipping based on substitutions.
- ✓
Create two triggers: one with a branch filter for '^main$' that runs integration tests, and another with a branch filter for '^.*$' that runs unit tests.
Why this is correct
Correct: separate triggers with branch filters allow different pipelines per branch.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure one trigger with no branch filter and rely on developers to manually trigger integration tests.
Why it's wrong here
Defeats automation; manual triggers are not the intended solution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates mistakenly think a single trigger with conditional steps or substitution variables can handle branch-specific logic, but Cloud Build triggers are designed to be event-filtered at the trigger level, not at the build step level.
Detailed technical explanation
How to think about this question
Cloud Build triggers evaluate branch filters using RE2 regular expressions against the full branch reference (e.g., 'refs/heads/main'). The '^main$' pattern ensures only pushes to the exact 'main' branch fire the trigger, while '^.*$' matches any branch. Under the hood, Cloud Build triggers are event-driven; each trigger is independently evaluated by the Cloud Build service when a repository event occurs, and only triggers whose branch filter matches the event's branch will execute their associated build config. This separation of concerns avoids complex conditional logic and keeps build configurations clean and maintainable.
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 — study guide chapter
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Building and implementing CI/CD pipelines practice questions
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FAQ
Questions learners often ask
What does this PCDOE question test?
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: Create two triggers: one with a branch filter for '^main$' that runs integration tests, and another with a branch filter for '^.*$' that runs unit tests. — Option C is correct because Cloud Build triggers allow you to define separate triggers with branch filters to execute different build configurations based on the branch. By creating one trigger with a branch filter of '^main$' for integration tests and another with '^.*$' for unit tests, you ensure unit tests run on every push to any branch, while integration tests run only on merges to main. This approach directly maps the desired behavior without requiring conditional logic or manual intervention.
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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Last reviewed: Jun 11, 2026
This PCDOE 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 PCDOE exam.
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