The answer is that the execution IAM role has not been created in the target accounts. When using CloudFormation StackSets with self-managed permissions, the administrator account does not automatically provision the required IAM roles in each target account; you must manually create an execution role in every target account that grants StackSets the necessary permissions to deploy resources. This is a critical distinction from service-managed permissions, where AWS Organizations handles role creation automatically. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of StackSets permission models and the common pitfall of assuming roles are pre-configured. A frequent trap is confusing the administrator role (used in the management account) with the execution role (needed in each target account). Memory tip: think “self-managed means you manage the roles yourself—no auto-provisioning in target accounts.”
DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. 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 uses AWS CloudFormation StackSets to deploy a VPC across multiple AWS accounts in AWS Organizations. The StackSet is created with self-managed permissions. The deployment fails in some accounts with the error: 'Insufficient IAM permissions to create resources'. What is the most likely cause of this failure?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The execution IAM role is not created in the target accounts
With self-managed permissions in AWS CloudFormation StackSets, the administrator account does not automatically create the necessary IAM roles in target accounts. The execution IAM role must be manually created in each target account to grant StackSets the permissions required to create resources. The error 'Insufficient IAM permissions to create resources' directly indicates that this execution role is missing or lacks the required policies.
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.
✗
The StackSet does not support deploying to more than one account
Why it's wrong here
StackSets are designed for multi-account deployments.
✓
The execution IAM role is not created in the target accounts
Why this is correct
Self-managed permissions require an execution role in each target account.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The administrator account does not have a service-linked role for StackSets
Why it's wrong here
Self-managed StackSets do not use service-linked roles.
✗
The target accounts have reached their resource service quotas
Why it's wrong here
Service quota errors are different from IAM permission errors.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse self-managed and service-managed permissions, assuming that StackSets automatically handle IAM roles in target accounts, when in fact self-managed requires manual role creation in each target account.
Detailed technical explanation
How to think about this question
In self-managed StackSets, the administrator account uses an IAM role (typically named 'AWSCloudFormationStackSetAdministrationRole') to assume an execution role (typically named 'AWSCloudFormationStackSetExecutionRole') in each target account. The execution role must have a trust policy allowing the administrator role to assume it, and must include permissions for the resources being created (e.g., ec2:* for VPCs). If this role is missing or misconfigured, the assumption fails, leading to the 'Insufficient IAM permissions' error.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The execution IAM role is not created in the target accounts — With self-managed permissions in AWS CloudFormation StackSets, the administrator account does not automatically create the necessary IAM roles in target accounts. The execution IAM role must be manually created in each target account to grant StackSets the permissions required to create resources. The error 'Insufficient IAM permissions to create resources' directly indicates that this execution role is missing or lacks the required policies.
What should I do if I get this DOP-C02 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: "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?
Read the scenario before looking for a memorised answer.
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 →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company uses AWS CloudFormation to deploy a web application across multiple AWS accounts using StackSets. The DevOps team notices that stack instance updates are failing in some accounts with the error: 'Insufficient IAM permissions to perform the action'. The team has already verified that the StackSet IAM role has the necessary permissions. What is the most likely cause of this issue?
medium
A.The target accounts have reached the limit of 200 stacks per region.
✓ B.The target accounts do not have the necessary trust policy to allow the StackSet IAM role to assume the execution role.
C.AWS Organizations has a service control policy (SCP) that denies the required action, but the StackSet IAM role has full admin permissions.
D.The StackSet name contains invalid characters that are not allowed in some accounts.
Why B: Option B is correct because StackSets require that the target accounts have a trust policy allowing the StackSet IAM role to assume a role in those accounts. Option A is wrong because the error is about permissions, not limit. Option C is wrong because the stack set name is not relevant. Option D is wrong because SCPs can block permissions even if the IAM role has them.
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This DOP-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 DOP-C02 exam.
Question Discussion
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