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ACE Practice Question: A project has the following IAM bindings: User A…

This ACE practice question tests your understanding of a project has the following iam bindings: user a…. 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 project has the following IAM bindings: User A has `roles/editor` at the project level, and a folder-level policy denies `roles/editor` to User A. Which effective permission does User A have on the project?

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A project has the following IAM bindings: User A has `roles/editor` at the project level, and a folder-level policy denies `roles/editor` to User A. Which effective permission does User A have on the project?

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

User A has Editor permissions because project-level IAM takes precedence over folder-level.

Standard IAM allow policies are additive — they don't override each other. But IAM Deny policies (a distinct feature) at a higher level in the hierarchy DO override allow grants lower in the hierarchy.

B

Distractor review

User A has no permissions because conflicting policies result in no access.

Only the specific denied permissions are blocked, not all permissions. If User A has other roles or permissions not covered by the deny, those remain effective.

C

Best answer

User A is denied Editor permissions because IAM Deny policies at a parent resource override allow grants at child resources.

IAM Deny policies, when set at a folder level, prevent the denied permissions from taking effect on all child resources, including the project — even if the project has an allow binding for those permissions. Deny takes precedence over allow.

D

Distractor review

User A has Editor permissions because folder-level policies don't apply to individual projects.

Folder-level IAM policies (both allow and deny) inherit to all child resources, including projects within the folder.

Common exam trap

Common exam trap: ACLs stop at the first match

ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.

Technical deep dive

How to think about this question

ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.

KKey Concepts to Remember

  • Standard ACLs match source addresses.
  • Extended ACLs can match source, destination, protocol and ports.
  • The first matching ACL entry is used.
  • There is usually an implicit deny at the end.

TExam Day Tips

  • Check inbound versus outbound direction.
  • Read the ACL from top to bottom.
  • Look for a broader permit or deny above the intended line.

Key takeaway

ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.

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FAQ

Questions learners often ask

What does this ACE question test?

Standard ACLs match source addresses.

What is the correct answer to this question?

The correct answer is: User A is denied Editor permissions because IAM Deny policies at a parent resource override allow grants at child resources. — GCP IAM uses a hierarchical evaluation model, but IAM Deny policies are a separate feature from regular IAM allow policies. In standard IAM (without Deny policies), permissions flow downward — a project-level binding grants permissions regardless of what's set at the folder level (there's no 'deny' in allow policies; only additive grants). However, with IAM Deny policies (a distinct feature), deny rules evaluated before allow rules take effect. The question describes a folder-level 'deny' which in the IAM Deny Policy feature overrides the project-level allow grant.

What should I do if I get this ACE question wrong?

Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related ACE ACL questions on filtering logic and placement.

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