- A
An IAM permissions policy attached to a role that only your security team uses
Why wrong: An IAM policy limits what the specific role can do, but it does not prevent other accounts or other principals from creating access keys.
- B
An Organizations service control policy (SCP) that explicitly denies CreateAccessKey
SCPs provide guardrails that apply to all principals in member accounts. By explicitly denying the IAM action at the organization level, you can prevent access key creation even if local IAM policies would otherwise allow it.
- C
A KMS key policy that blocks key creation and reuse
Why wrong: KMS key policies control cryptographic key usage, not IAM access key creation. They do not enforce IAM action restrictions across accounts.
- D
A permission boundary on a single IAM role
Why wrong: Permission boundaries apply to a specific role and do not automatically cover all principals across all accounts. They also do not override the need for organization-wide enforcement.
Quick Answer
The answer is an Organizations service control policy (SCP) that explicitly denies the `iam:CreateAccessKey` action. An SCP is the correct mechanism because it operates at the AWS Organizations root, OU, or account level to define a central guardrail that cannot be overridden by any IAM principal, including account administrators. This makes it the only tool capable of enforcing a blanket denial across all accounts, as local IAM policies or permissions boundaries can still be bypassed by a determined admin with full control. On the SAA-C03 exam, this scenario tests your understanding of the SCP’s unique ability to set a hard boundary that even the root user cannot escape—a common trap is confusing SCPs with IAM permissions boundaries, which only limit but do not prevent override. Remember the mnemonic: SCPs are the “supreme command perimeter” because they sit above all IAM policies and cannot be countermanded.
SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. 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.
You manage multiple AWS accounts under AWS Organizations. A compliance requirement states: no account is allowed to create new IAM access keys for IAM users. Local administrators may attempt to override permissions. Which mechanism should you use to enforce this guardrail across all accounts?
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
An Organizations service control policy (SCP) that explicitly denies CreateAccessKey
An SCP is the correct mechanism because it operates at the AWS Organizations root, OU, or account level to define a central guardrail that cannot be overridden by any IAM principal, including account administrators. By explicitly denying the `iam:CreateAccessKey` action, the SCP ensures that no IAM user in any account can create new access keys, fulfilling the compliance requirement across all accounts.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
An IAM permissions policy attached to a role that only your security team uses
Why it's wrong here
An IAM policy limits what the specific role can do, but it does not prevent other accounts or other principals from creating access keys.
- ✓
An Organizations service control policy (SCP) that explicitly denies CreateAccessKey
Why this is correct
SCPs provide guardrails that apply to all principals in member accounts. By explicitly denying the IAM action at the organization level, you can prevent access key creation even if local IAM policies would otherwise allow it.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A KMS key policy that blocks key creation and reuse
Why it's wrong here
KMS key policies control cryptographic key usage, not IAM access key creation. They do not enforce IAM action restrictions across accounts.
- ✗
A permission boundary on a single IAM role
Why it's wrong here
Permission boundaries apply to a specific role and do not automatically cover all principals across all accounts. They also do not override the need for organization-wide enforcement.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse SCPs with IAM permission boundaries or think that a restrictive IAM policy on a single role can enforce a global guardrail, but only SCPs provide organization-wide, unoverridable control over all principals.
Detailed technical explanation
How to think about this question
SCPs are evaluated before any IAM policies and act as a filter that denies actions even if an IAM policy grants them; they use a deny-by-default model where an explicit deny overrides any allow. In a multi-account environment, SCPs are the only mechanism that can enforce a blanket restriction across all accounts without requiring per-account configuration, and they cannot be bypassed by account administrators because they are applied at the organization level.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Secure Architectures — This question tests Design Secure Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: An Organizations service control policy (SCP) that explicitly denies CreateAccessKey — An SCP is the correct mechanism because it operates at the AWS Organizations root, OU, or account level to define a central guardrail that cannot be overridden by any IAM principal, including account administrators. By explicitly denying the `iam:CreateAccessKey` action, the SCP ensures that no IAM user in any account can create new access keys, fulfilling the compliance requirement across all accounts.
What should I do if I get this SAA-C03 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This SAA-C03 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 SAA-C03 exam.
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