SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. 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.
Exhibit
{
"current_state": {
"approved_boundary": "arn:aws:iam::111122223333:policy/ApprovedAppBoundary",
"developer_role_policy": ["iam:CreateRole", "iam:PutRolePolicy", "iam:AttachRolePolicy"],
"incident": "A new role was created without a permissions boundary and attached an overly permissive policy"
},
"desired_state": "All future roles must be created with ApprovedAppBoundary"
}
Based on the exhibit, a development team in member accounts can create IAM roles, but one team created a role without the required permissions boundary. Security wants to ensure that no future role in the organization can exceed the approved boundary, even if a developer has broad IAM permissions. What is the best control to add?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
{
"current_state": {
"approved_boundary": "arn:aws:iam::111122223333:policy/ApprovedAppBoundary",
"developer_role_policy": ["iam:CreateRole", "iam:PutRolePolicy", "iam:AttachRolePolicy"],
"incident": "A new role was created without a permissions boundary and attached an overly permissive policy"
},
"desired_state": "All future roles must be created with ApprovedAppBoundary"
}
A
Add a permission boundary to the developer role that points to ApprovedAppBoundary.
Why wrong: That only constrains the developer role itself; it does not force new roles to use the approved boundary.
B
Add an SCP that denies iam:CreateRole and iam:PutRolePermissionsBoundary unless the request specifies the ApprovedAppBoundary ARN.
An SCP can enforce organization-wide guardrails so roles cannot be created without the required boundary.
C
Use an S3 bucket policy to block policy documents that grant AdministratorAccess.
Why wrong: S3 bucket policies do not control IAM role creation or IAM policy attachment.
D
Require team members to use STS session policies when they create new roles.
Why wrong: Session policies only limit temporary sessions and do not force a permissions boundary on newly created roles.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add an SCP that denies iam:CreateRole and iam:PutRolePermissionsBoundary unless the request specifies the ApprovedAppBoundary ARN.
Option B is correct because a Service Control Policy (SCP) at the organization root or in the member account's OU can deny IAM actions unless the required permissions boundary (ApprovedAppBoundary) is specified. This prevents any role creation or modification that would bypass the boundary, even if the developer has full IAM permissions in their account. SCPs are the only control that can enforce this across all principals in an account, including the account root user.
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.
✗
Add a permission boundary to the developer role that points to ApprovedAppBoundary.
Why it's wrong here
That only constrains the developer role itself; it does not force new roles to use the approved boundary.
✓
Add an SCP that denies iam:CreateRole and iam:PutRolePermissionsBoundary unless the request specifies the ApprovedAppBoundary ARN.
Why this is correct
An SCP can enforce organization-wide guardrails so roles cannot be created without the required boundary.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use an S3 bucket policy to block policy documents that grant AdministratorAccess.
Why it's wrong here
S3 bucket policies do not control IAM role creation or IAM policy attachment.
✗
Require team members to use STS session policies when they create new roles.
Why it's wrong here
Session policies only limit temporary sessions and do not force a permissions boundary on newly created roles.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume an IAM permission boundary on the developer role is sufficient, but SCPs are the only way to enforce a mandatory boundary across all principals in an account, including those with full administrative access.
Detailed technical explanation
How to think about this question
SCPs are evaluated before IAM policies and can explicitly deny actions even if an IAM policy allows them. The condition key `iam:PermissionsBoundary` must match the ARN of the approved boundary; using `ForAnyValue:StringEquals` ensures the boundary is present and correct. This is a defense-in-depth mechanism that works at the organization level, overriding any IAM permissions within member accounts.
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 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: Add an SCP that denies iam:CreateRole and iam:PutRolePermissionsBoundary unless the request specifies the ApprovedAppBoundary ARN. — Option B is correct because a Service Control Policy (SCP) at the organization root or in the member account's OU can deny IAM actions unless the required permissions boundary (ApprovedAppBoundary) is specified. This prevents any role creation or modification that would bypass the boundary, even if the developer has full IAM permissions in their account. SCPs are the only control that can enforce this across all principals in an account, including the account root user.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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