Google PCA Manage and provision cloud infrastructure Practice Question
This PCA practice question tests your understanding of manage and provision cloud infrastructure. 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 uses Cloud Build to build container images and deploy to Cloud Run. They want to automate deployments whenever a new image is pushed to Container Registry. What is the best approach?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a Cloud Build trigger that runs on a push to the container image in Container Registry
Option B is correct because Cloud Build triggers can be configured to fire on a push to a container image in Container Registry, using the 'cloud-builds' Pub/Sub topic that Container Registry publishes to when an image is pushed. This allows Cloud Build to automatically run a build step (e.g., gcloud run deploy) to deploy the new image to Cloud Run without any polling or external infrastructure.
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 Cloud Deploy with a delivery pipeline that polls for new images
Why it's wrong here
Cloud Deploy does not have native image push trigger without Cloud Build.
✓
Configure a Cloud Build trigger that runs on a push to the container image in Container Registry
Why this is correct
Cloud Build triggers can respond to image push events directly.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a Cloud Function that subscribes to Pub/Sub and calls Cloud Run deploy
Why it's wrong here
Possible but not the simplest; custom code needed.
✗
Set up a Cloud Scheduler job to run a script that deploys the latest image
Why it's wrong here
Not event-driven; runs on schedule.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may overcomplicate the solution by choosing Cloud Functions or Cloud Scheduler, missing the fact that Cloud Build triggers natively integrate with Container Registry's Pub/Sub events for automated, event-driven deployments.
Detailed technical explanation
How to think about this question
Under the hood, Container Registry automatically publishes a message to the 'gcr' Pub/Sub topic (e.g., projects/{project}/topics/gcr) whenever a new image is pushed. Cloud Build triggers can subscribe to this topic via a filter on the resource name (e.g., 'gcr.io/my-project/my-image:*'), enabling event-driven builds. This avoids the need for polling or custom middleware, and the trigger can directly execute a 'gcloud run deploy' command in a build step, ensuring the deployment runs with the exact image digest.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Manage and provision cloud infrastructure — This question tests Manage and provision cloud infrastructure — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure a Cloud Build trigger that runs on a push to the container image in Container Registry — Option B is correct because Cloud Build triggers can be configured to fire on a push to a container image in Container Registry, using the 'cloud-builds' Pub/Sub topic that Container Registry publishes to when an image is pushed. This allows Cloud Build to automatically run a build step (e.g., gcloud run deploy) to deploy the new image to Cloud Run without any polling or external infrastructure.
What should I do if I get this PCA 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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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