← SOA-C02·Amazon Web Services

Question 494 of 1,546

Reliability and Business Continuity →mediumMultiple ChoiceObjective-mapped

Quick Answer

The answer is that the policy’s condition is not properly configured to check for MFA, specifically missing the `aws:MultiFactorAuthPresent` condition key set to `false`. For a Deny effect to block all services when MFA is absent, the condition must explicitly evaluate whether the session lacks MFA; without this condition, the Deny statement never triggers, allowing users without MFA to access services like S3. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding of how IAM policy conditions enforce MFA for all services, a common trap being that an Allow statement alone cannot restrict access—only a Deny with the correct condition works. The exam often hides the fix in the condition key name, so remember that `aws:MultiFactorAuthPresent` is the exact key, not `aws:MFAPresent`. Memory tip: think “Deny when false” — if MFA is not present, the condition is false, so set `aws:MultiFactorAuthPresent` to `false` to lock the door.

SOA-C02 Reliability and Business Continuity Practice Question

This SOA-C02 practice question tests your understanding of reliability and business continuity. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 has a production AWS account with multiple IAM users. The SysOps administrator needs to ensure that all IAM users have multi-factor authentication (MFA) enabled for console access. If a user does not have MFA enabled, they should be denied access to all AWS services except for the ability to enable MFA on their own account. The administrator has created an IAM policy that denies all actions if MFA is not present, but the policy is not working as expected; users without MFA can still access the S3 console. The administrator attaches the policy to all users. What is the most likely reason the policy is not effective?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

Question 1mediummultiple choice

Full question →

A
The policy includes an Allow statement that grants access to all services, which overrides the Deny statement.
Why wrong: An explicit Deny overrides any Allow, so if the Deny is correctly written, it should block access.
B
The policy's condition is not properly configured to check for MFA. The condition should use 'aws:MultiFactorAuthPresent' with a value of 'false'.
Without the correct condition, the Deny statement does not evaluate to true, so users without MFA are not denied.
C
The policy uses the condition key 'aws:MFAPresent' instead of 'aws:MultiFactorAuthPresent'.
Why wrong: The correct condition key is 'aws:MultiFactorAuthPresent'. If the wrong key is used, the condition is ignored, but the Deny might still not apply as intended.
D
The policy is attached to an IAM group, but the users are not members of that group.
Why wrong: The administrator attached the policy to all users directly, so group membership is not the issue.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The policy's condition is not properly configured to check for MFA. The condition should use 'aws:MultiFactorAuthPresent' with a value of 'false'.

Option B is correct because for the Deny effect to work, the condition must check for the presence of MFA. The condition key 'aws:MultiFactorAuthPresent' should be set to 'false' to deny access. If the condition is missing or incorrectly configured, the Deny statement does not apply. Option A is wrong because the policy needs to explicitly deny actions when MFA is not present; an Allow statement would not restrict. Option C is wrong because the policy should be attached to users or groups, not to all principals. Option D is wrong because the condition key is 'aws:MultiFactorAuthPresent', not 'aws:MFAPresent'.

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

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
The policy includes an Allow statement that grants access to all services, which overrides the Deny statement.
Why it's wrong here
An explicit Deny overrides any Allow, so if the Deny is correctly written, it should block access.
✓
The policy's condition is not properly configured to check for MFA. The condition should use 'aws:MultiFactorAuthPresent' with a value of 'false'.
Why this is correct
Without the correct condition, the Deny statement does not evaluate to true, so users without MFA are not denied.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
✗
The policy uses the condition key 'aws:MFAPresent' instead of 'aws:MultiFactorAuthPresent'.
Why it's wrong here
The correct condition key is 'aws:MultiFactorAuthPresent'. If the wrong key is used, the condition is ignored, but the Deny might still not apply as intended.
✗
The policy is attached to an IAM group, but the users are not members of that group.
Why it's wrong here
The administrator attached the policy to all users directly, so group membership is not the issue.

Common exam traps

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.

Detailed technical explanation

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.

Real-world example

How this comes up in practice

A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.

What to study next

Got this wrong? Here's your next step.

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.

Related SOA-C02 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

Monitoring, Logging, and Remediation practice questions

Practise SOA-C02 questions linked to Monitoring, Logging, and Remediation.

Reliability and Business Continuity practice questions

Practise SOA-C02 questions linked to Reliability and Business Continuity.

Deployment, Provisioning, and Automation practice questions

Practise SOA-C02 questions linked to Deployment, Provisioning, and Automation.

Security and Compliance practice questions

Practise SOA-C02 questions linked to Security and Compliance.

Networking and Content Delivery practice questions

Practise SOA-C02 questions linked to Networking and Content Delivery.

Cost and Performance Optimization practice questions

Practise SOA-C02 questions linked to Cost and Performance Optimization.

SOA-C02 fundamentals practice questions

Practise SOA-C02 questions linked to SOA-C02 fundamentals.

SOA-C02 scenario practice questions

Practise SOA-C02 questions linked to SOA-C02 scenario.

SOA-C02 troubleshooting practice questions

Practise SOA-C02 questions linked to SOA-C02 troubleshooting.

Practice this exam

Start a free SOA-C02 practice session

Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.

10 questions 20 questions 30 questions 50 questions Timed 30

SOA-C02 practice-test guide →Study guide →Browse all practice tests

FAQ

Questions learners often ask

What does this SOA-C02 question test?

Reliability and Business Continuity — This question tests Reliability and Business Continuity — Standard ACLs match source addresses..

What is the correct answer to this question?

The correct answer is: The policy's condition is not properly configured to check for MFA. The condition should use 'aws:MultiFactorAuthPresent' with a value of 'false'. — Option B is correct because for the Deny effect to work, the condition must check for the presence of MFA. The condition key 'aws:MultiFactorAuthPresent' should be set to 'false' to deny access. If the condition is missing or incorrectly configured, the Deny statement does not apply. Option A is wrong because the policy needs to explicitly deny actions when MFA is not present; an Allow statement would not restrict. Option C is wrong because the policy should be attached to users or groups, not to all principals. Option D is wrong because the condition key is 'aws:MultiFactorAuthPresent', not 'aws:MFAPresent'.

What should I do if I get this SOA-C02 question wrong?

Are there clue words in this question I should notice?

Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

Standard ACLs match source addresses.

About these practice questions

Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →

How Courseiva writes practice questions · Editorial policy

Keep practising

Question Discussion

Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.

Loading comments…

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.