PCD Building and testing applications Practice Question
This PCD practice question tests your understanding of building and testing 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 above command and receives a successful deployment. However, the service is not accessible from the internet. The service is intended to be public. What should the developer check next?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The service IAM policy to ensure allUsers has Cloud Run Invoker role
Option D is correct because Cloud Run services are private by default; even after a successful deployment, the service will not be accessible from the internet unless the IAM policy explicitly grants the `roles/run.invoker` role to `allUsers`. Without this permission, any HTTP request from outside the project will be denied with a 403 Forbidden error, regardless of the service's health or region.
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 region us-central1 is not available
Why it's wrong here
us-central1 is a valid region and the deployment succeeded, so this is not an issue.
✗
The Cloud Run service has a custom domain mapped
Why it's wrong here
The default URL should work; a custom domain is optional.
✗
The container image is healthy
Why it's wrong here
The deployment succeeded, so the image is healthy. If it weren't, the revision would show errors.
✓
The service IAM policy to ensure allUsers has Cloud Run Invoker role
Why this is correct
This is the most common reason for a publicly inaccessible Cloud Run service after successful deployment.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that a successful deployment or a healthy container automatically makes a service publicly accessible, when in fact Cloud Run requires an explicit IAM binding to allow unauthenticated invocations.
Trap categories for this question
Command / output trap
The deployment succeeded, so the image is healthy. If it weren't, the revision would show errors.
Detailed technical explanation
How to think about this question
Cloud Run uses Identity-Aware Proxy (IAP) and IAM to enforce access control; by default, the `cloudrun.fullyPrivate` annotation is set to `true`, which means only authenticated requests with a valid OAuth2 token are allowed. To make the service public, you must run `gcloud run services add-iam-policy-binding SERVICE --member='allUsers' --role='roles/run.invoker'`, which grants the `run.routes.invoke` permission to unauthenticated users. This is a common pitfall because many developers assume that a successful deployment automatically implies public accessibility, but Cloud Run explicitly separates deployment from access control.
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 service IAM policy to ensure allUsers has Cloud Run Invoker role — Option D is correct because Cloud Run services are private by default; even after a successful deployment, the service will not be accessible from the internet unless the IAM policy explicitly grants the `roles/run.invoker` role to `allUsers`. Without this permission, any HTTP request from outside the project will be denied with a 403 Forbidden error, regardless of the service's health or region.
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.
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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
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