This PCSE practice question tests your understanding of supporting compliance requirements. 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.
A company must ensure that all Compute Engine instances use only approved images from a specific project. They want to enforce this using Organization Policy. Which constraint should they use?
constraints/compute.restrictImageUsage
This constraint restricts which images can be used to create instances.
constraints/compute.restrictAuthorizedDomains
Why wrong: This restricts domains for Cloud Storage.
constraints/compute.trustedImageProjects
Why wrong: This is not a valid constraint name.
constraints/compute.restrictFirewallRules
Why wrong: This restricts firewall rule creation.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
constraints/compute.restrictImageUsage
The correct constraint is `constraints/compute.restrictImageUsage` because it directly controls which images can be used to create Compute Engine instances by specifying a list of allowed projects. This enforces the requirement that only approved images from a specific project are used, blocking instances launched with images from other projects.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
constraints/compute.restrictImageUsage
Why this is correct
This constraint restricts which images can be used to create instances.
Related concept
Read the scenario before looking for a memorised answer.
constraints/compute.restrictAuthorizedDomains
Why it's wrong here
This restricts domains for Cloud Storage.
constraints/compute.trustedImageProjects
Why it's wrong here
This is not a valid constraint name.
constraints/compute.restrictFirewallRules
Why it's wrong here
This restricts firewall rule creation.
Common exam traps
Google Cloud often tests the distinction between valid and invalid constraint names, and the trap here is that candidates confuse the non-existent `constraints/compute.trustedImageProjects` with the real `constraints/compute.restrictImageUsage` because the word 'trusted' appears in the documentation for the feature but not in the constraint name.
Detailed technical explanation
Under the hood, `constraints/compute.restrictImageUsage` is a list constraint that, when applied at the organization, folder, or project level, filters the `sourceImage` field during instance creation. It evaluates the project of the image against the allowed list, and if the image project is not in the list, the API call fails with a 403 error. A real-world scenario is a financial institution that must only use hardened images from a central security project, preventing developers from accidentally using public images with unpatched vulnerabilities.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
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FAQ
Supporting compliance requirements — This question tests Supporting compliance requirements — Read the scenario before looking for a memorised answer..
The correct answer is: constraints/compute.restrictImageUsage — The correct constraint is `constraints/compute.restrictImageUsage` because it directly controls which images can be used to create Compute Engine instances by specifying a list of allowed projects. This enforces the requirement that only approved images from a specific project are used, blocking instances launched with images from other projects.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This PCSE 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 PCSE exam.
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