- A
Deploy with --allow-unauthenticated and set up a Pub/Sub subscription with OIDC token audience
Why wrong: --allow-unauthenticated allows anyone to invoke; not secure.
- B
Deploy with --no-allow-unauthenticated and create a VPC connector to allow Pub/Sub internal traffic
Why wrong: VPC connector does not handle authentication; Pub/Sub still needs to authenticate.
- C
Deploy with --no-allow-unauthenticated and configure the Pub/Sub subscription to use a service account that has the roles/run.invoker role on the Cloud Run service
This is the correct approach: only authenticated requests are allowed, and Pub/Sub uses a service account to authenticate.
- D
Use Cloud Functions instead, which is more secure for Pub/Sub triggers
Why wrong: Cloud Functions can also be secured similarly; this does not address the Cloud Run requirement.
Google ACE Deploying and Implementing a Cloud Solution Practice Question
This ACE practice question tests your understanding of deploying and implementing a cloud solution. 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 deploying a microservice to Cloud Run that needs to process messages from Pub/Sub. The service should only be invocable by Pub/Sub push deliveries, not by unauthenticated HTTP requests. What should the team do?
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
Deploy with --no-allow-unauthenticated and configure the Pub/Sub subscription to use a service account that has the roles/run.invoker role on the Cloud Run service
To restrict invocation to only Pub/Sub, the Cloud Run service must require authentication and the Pub/Sub subscription must be configured to use a service account to push. The --no-allow-unauthenticated flag ensures only authenticated requests are accepted, and the Pub/Sub subscription's push endpoint must be set with the service's URL and use a service account with the run.invoker role.
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.
- ✗
Deploy with --allow-unauthenticated and set up a Pub/Sub subscription with OIDC token audience
Why it's wrong here
--allow-unauthenticated allows anyone to invoke; not secure.
- ✗
Deploy with --no-allow-unauthenticated and create a VPC connector to allow Pub/Sub internal traffic
Why it's wrong here
VPC connector does not handle authentication; Pub/Sub still needs to authenticate.
- ✓
Deploy with --no-allow-unauthenticated and configure the Pub/Sub subscription to use a service account that has the roles/run.invoker role on the Cloud Run service
Why this is correct
This is the correct approach: only authenticated requests are allowed, and Pub/Sub uses a service account to authenticate.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use Cloud Functions instead, which is more secure for Pub/Sub triggers
Why it's wrong here
Cloud Functions can also be secured similarly; this does not address the Cloud Run requirement.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Similar concept trap
Cloud Functions can also be secured similarly; this does not address the Cloud Run requirement.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 ACE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this ACE question test?
Deploying and Implementing a Cloud Solution — This question tests Deploying and Implementing a Cloud Solution — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy with --no-allow-unauthenticated and configure the Pub/Sub subscription to use a service account that has the roles/run.invoker role on the Cloud Run service — To restrict invocation to only Pub/Sub, the Cloud Run service must require authentication and the Pub/Sub subscription must be configured to use a service account to push. The --no-allow-unauthenticated flag ensures only authenticated requests are accepted, and the Pub/Sub subscription's push endpoint must be set with the service's URL and use a service account with the run.invoker role.
What should I do if I get this ACE question wrong?
Identify which ACE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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 →
Last reviewed: Jul 4, 2026
This ACE 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 ACE exam.
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