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ACE Practice Question: Needs to ensure that only images from their…
This ACE practice question tests your understanding of needs to ensure that only images from their…. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
An organization needs to ensure that only images from their approved Container Registry (gcr.io/approved-project) can be deployed on GKE clusters in their organization. Which GCP control enforces this?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
A VPC firewall rule blocking pulls from unauthorized registries
Firewall rules control network-level traffic — they can't distinguish between authorized and unauthorized container registry pulls.
B
Distractor review
Cloud Armor rules blocking container pull requests from external sources
Cloud Armor is a WAF for incoming HTTP traffic to load balancers — it doesn't control container image registry operations.
C
Best answer
Binary Authorization with a policy requiring attestation from the approved registry
Binary Authorization enforces image deployment policies on GKE clusters — it can require cryptographic attestations from approved registries and block non-compliant images at deploy time.
D
Distractor review
Manually reviewing all Docker images before deployment
Manual review doesn't scale and can't enforce policy programmatically — Binary Authorization provides automated enforcement.
Common exam trap
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Technical deep dive
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Related practice questions
Related ACE practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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Question 3
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Question 4
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Question 5
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Question 6
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FAQ
Questions learners often ask
What does this ACE question test?
Authentication checks who the user is.
What is the correct answer to this question?
The correct answer is: Binary Authorization with a policy requiring attestation from the approved registry — Binary Authorization is a GCP feature that enforces policies on container images deployed to GKE and Cloud Run. It can require attestations (cryptographic signatures proving images passed specified security checks) and allow only approved registries. Organization Policies can also restrict allowed registries via the `gke.allowedContainerRegistries` constraint.
What should I do if I get this ACE question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related ACE questions on access control and AAA configuration.
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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.