The correct answer is to apply a Service Control Policy (SCP) to the root organizational unit (OU) that denies the organizations:LeaveOrganization action and restricts root user actions across all member accounts. This works because SCPs act as a centralized permission guardrail at the AWS Organizations level, capable of explicitly denying API calls—including the root user—regardless of any IAM policies attached within an account. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of SCPs as the only mechanism that can block root user activity and prevent an account from detaching from the organization, a distinction that often appears in multi-account governance questions. A common trap is confusing IAM policies with SCPs: IAM policies cannot restrict the root user, while SCPs apply to all principals, including root. Remember the mnemonic “SCP = Supreme Control Point” to recall that SCPs override all other permissions and are the only tool for locking down root and organizational membership.
SAP-C02 Practice Question: Design Solutions for Organizational Complexity
This SAP-C02 practice question tests your understanding of design solutions for organizational complexity. 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 is migrating to AWS and wants to set up a multi-account structure using AWS Organizations. The security team requires that all accounts be part of an organization and that any attempt to leave the organization be blocked. Additionally, the company wants to prevent the use of the root user in member accounts for daily operations. What should they do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Apply an SCP to the root OU that denies the organizations:LeaveOrganization action and denies the root user's ability to perform actions.
Option C is correct because SCPs can deny leaving the organization and restrict root user actions. Option A is wrong because IAM policies cannot restrict root user. Option B is wrong because CloudTrail does not prevent actions. Option D is wrong because AWS Config cannot block actions.
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.
✓
Apply an SCP to the root OU that denies the organizations:LeaveOrganization action and denies the root user's ability to perform actions.
Why this is correct
SCPs apply to root user and all IAM entities; can block leave and restrict root.
Related concept
Standard ACLs match source addresses.
✗
Create an IAM policy that denies the organizations:LeaveOrganization action and attach it to all IAM users.
Why it's wrong here
Root user is not affected by IAM policies.
✗
Use AWS Config rules to detect when an account leaves the organization and automatically rejoin it.
Use AWS CloudTrail to monitor and alert on root user activity and organizations:LeaveOrganization.
Why it's wrong here
Monitoring does not prevent actions.
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 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
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 SAP-C02 ACL questions on filtering logic and placement.
Design Solutions for Organizational Complexity — This question tests Design Solutions for Organizational Complexity — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Apply an SCP to the root OU that denies the organizations:LeaveOrganization action and denies the root user's ability to perform actions. — Option C is correct because SCPs can deny leaving the organization and restrict root user actions. Option A is wrong because IAM policies cannot restrict root user. Option B is wrong because CloudTrail does not prevent actions. Option D is wrong because AWS Config cannot block actions.
What should I do if I get this SAP-C02 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 SAP-C02 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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