Quick Answer
The correct answer is to use a Condition element with 'aws:MultiFactorAuthPresent' set to 'true' in a Deny policy. This works because the Condition block evaluates the request context at runtime; by setting the condition key to check for a 'true' value, you effectively require MFA for any action, while a Deny effect ensures that any request lacking MFA is blocked. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this tests your understanding of IAM policy evaluation logic and the specific use of condition keys to enforce security controls—a common trap is confusing the Condition element with Resource or Action, which cannot enforce MFA. Remember that MFA enforcement always relies on a Deny with a Condition, not an Allow, because you must explicitly block unauthenticated sessions. A useful memory tip: "Deny with a Condition, not an Allow permission—MFA must be checked, not just granted."
This SOA-C02 practice question tests your understanding of security and compliance. 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.
An organization wants to enforce that all IAM users have multi-factor authentication (MFA) enabled before they can perform any action except changing their own password. Which IAM policy element is MOST appropriate?
Use a Condition element with 'aws:MultiFactorAuthPresent' set to 'true' in a Deny policy.
Denies access if MFA is not present.
Use an Action element to allow only MFA actions.
Why wrong: Action specifies operations.
Use a NotAction element to allow password change without MFA.
Why wrong: NotAction is not the primary method.
Use a Resource element to limit access to MFA-enabled users.
Why wrong: Resource does not enforce MFA.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use a Condition element with 'aws:MultiFactorAuthPresent' set to 'true' in a Deny policy.
Option A is correct because a Condition with 'aws:MultiFactorAuthPresent':'true' can be used to require MFA. Option B is wrong because Resource doesn't enforce MFA. Option C is wrong because Action specifies actions. Option D is wrong because NotAction is not for MFA enforcement.
Key principle: 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.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Use a Condition element with 'aws:MultiFactorAuthPresent' set to 'true' in a Deny policy.
Why this is correct
Denies access if MFA is not present.
Related concept
Standard ACLs match source addresses.
Use an Action element to allow only MFA actions.
Why it's wrong here
Action specifies operations.
Use a NotAction element to allow password change without MFA.
Why it's wrong here
NotAction is not the primary method.
Use a Resource element to limit access to MFA-enabled users.
Why it's wrong here
Resource does not enforce MFA.
Common exam traps
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
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.
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.
Real-world example
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
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 SOA-C02 ACL questions on filtering logic and placement.
Security and Compliance — study guide chapter
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FAQ
Security and Compliance — This question tests Security and Compliance — Standard ACLs match source addresses..
The correct answer is: Use a Condition element with 'aws:MultiFactorAuthPresent' set to 'true' in a Deny policy. — Option A is correct because a Condition with 'aws:MultiFactorAuthPresent':'true' can be used to require MFA. Option B is wrong because Resource doesn't enforce MFA. Option C is wrong because Action specifies actions. Option D is wrong because NotAction is not for MFA enforcement.
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 SOA-C02 ACL questions on filtering logic and placement.
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 2026
This SOA-C02 practice question is part of Courseiva's free Amazon Web Services 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 SOA-C02 exam.
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