Policy evaluation logic in AWS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the first step in AWS policy evaluation logic?

AWS starts by checking for any explicit Deny statements in the policies attached to the user or resource.

beginner

What happens if there is no explicit Deny and no Allow in AWS policy evaluation?

The default is to deny access if no explicit Allow is found.

intermediate

How does AWS handle multiple policies attached to a user or resource during evaluation?

AWS evaluates all policies together. If any policy explicitly denies, the request is denied. If none deny and at least one allows, the request is allowed.

beginner

What is the effect of an explicit Deny in AWS policy evaluation?

An explicit Deny always overrides any Allow, blocking the requested action regardless of other policies.

intermediate

Why is it important to understand AWS policy evaluation logic?

Understanding the logic helps you design policies that correctly allow or block actions, avoiding unintended access or denial.

In AWS policy evaluation, what happens if a policy explicitly denies an action?

A The action is allowed if another policy allows it.

B The action is allowed by default.

C The evaluation stops and asks for user confirmation.

D The action is denied regardless of other policies.

An explicit Deny always overrides any Allow, so the action is denied.

If no policy explicitly allows or denies an action in AWS, what is the result?

A The action is allowed by default.

B The action is denied by default.

C The action is allowed only if the user is an admin.

D The action is logged but not executed.

AWS denies actions by default if there is no explicit Allow.

When multiple policies apply, how does AWS decide to allow an action?

A If any policy denies, the action is allowed.

B Only the first policy is evaluated.

C If any policy allows and none deny, the action is allowed.

D Policies are ignored if the user is root.

AWS allows the action if at least one policy allows it and none explicitly deny it.

What is the role of resource-based policies in AWS policy evaluation?

A They are evaluated along with user policies.

B They are ignored if user policies exist.

C They override all user policies.

D They only apply to AWS root users.

Resource-based policies are evaluated together with user policies during access decisions.

Which of the following best describes AWS policy evaluation logic?

A Deny overrides Allow.

B Only one policy is evaluated per request.

C Policies are evaluated randomly.

D Allow overrides Deny.

Deny always overrides Allow in AWS policy evaluation.

Explain the order of evaluation in AWS policy evaluation logic.

Think about how AWS decides to allow or deny an action step by step.

Describe why an explicit Deny is important in AWS policies.

Consider the strongest rule in policy evaluation.