The answer is to add a cloudbuild.yaml file with a test step. This is correct because Cloud Build executes only the steps explicitly defined in its build configuration file; without a test step defined in cloudbuild.yaml, the pipeline will proceed directly to deployment without running any unit tests. On the Google Professional Cloud Developer exam, this question tests your understanding of how Cloud Build orchestrates CI/CD pipelines for App Engine, and a common trap is assuming tests run by default or that a separate trigger configuration handles testing. The key concept is that cloudbuild.yaml is the single source of truth for all build steps, including testing, building, and deploying. A useful memory tip is "YAML defines the pipeline" — if a step isn't written in the YAML, Cloud Build won't run it.
PCD Building and testing applications Practice Question
This PCD practice question tests your understanding of building and testing applications. 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 setting up a CI/CD pipeline for a Node.js App Engine application using Cloud Build. The source code is in Cloud Source Repositories. What must be configured to automatically run unit tests before deployment?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add a cloudbuild.yaml file with a test step
Option C is correct because Cloud Build uses a cloudbuild.yaml file to define build steps, and adding a test step ensures unit tests run automatically before deployment. Without this configuration, Cloud Build will not execute tests; it only runs the steps explicitly defined in the build configuration file.
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.
✗
Enable Cloud Build triggers on the repository
Why it's wrong here
Triggers need a build config to know what to run; enabling triggers alone is insufficient.
✗
Use the App Engine deployment wizard
Why it's wrong here
The wizard is for manual deployment, not for automated CI/CD.
✓
Add a cloudbuild.yaml file with a test step
Why this is correct
The build config defines the steps, including running tests; a trigger can then invoke it on push.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use a Dockerfile to run tests
Why it's wrong here
A Dockerfile builds an image; it's not how App Engine deploys or runs tests.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that enabling a trigger alone is sufficient to run tests, when in fact the trigger only initiates the build; the actual test execution must be explicitly defined in the build configuration file.
Detailed technical explanation
How to think about this question
Under the hood, Cloud Build executes steps sequentially as defined in cloudbuild.yaml, where each step runs in a separate container. A common pattern is to use the official Node.js image (e.g., 'node:18') for the test step, running 'npm test' or 'yarn test', and only if that step succeeds does the subsequent deploy step (e.g., 'gcloud app deploy') execute. In real-world scenarios, failing tests can halt the pipeline, preventing broken code from reaching production, which is critical for maintaining deployment integrity.
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.
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: Add a cloudbuild.yaml file with a test step — Option C is correct because Cloud Build uses a cloudbuild.yaml file to define build steps, and adding a test step ensures unit tests run automatically before deployment. Without this configuration, Cloud Build will not execute tests; it only runs the steps explicitly defined in the build configuration file.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This PCD 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 PCD exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.