DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. 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.
An IAM policy is attached to a user who needs to create a CloudFormation stack that provisions an EC2 instance and an S3 bucket. The user receives an 'Access Denied' error when running the 'aws cloudformation create-stack' command. Which additional permission is required?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
ec2:RunInstances and s3:CreateBucket
To successfully create a CloudFormation stack that provisions an EC2 instance and an S3 bucket, the IAM user must have permissions for the actions that CloudFormation will perform on their behalf. Specifically, ec2:RunInstances and s3:CreateBucket are required in addition to cloudformation:CreateStack. The 'Access Denied' error occurs because the user lacks these resource-level permissions. Notably, the DeletionPolicy attribute (e.g., Retain) only controls behavior when resources are deleted, not during stack creation or updates; it does not affect the permissions required for provisioning.
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.
✓
ec2:RunInstances and s3:CreateBucket
Why this is correct
CloudFormation uses the user's permissions to create the resources defined in the template.
Related concept
Read the scenario before looking for a memorised answer.
✗
s3:PutObject
Why it's wrong here
Not needed for creating a bucket; s3:CreateBucket is required.
✗
cloudformation:DescribeStacks
Why it's wrong here
This is needed for describing stacks, not for creating them.
✗
iam:PassRole
Why it's wrong here
Only needed if the template specifies an IAM role to pass.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume the cloudformation:CreateStack permission alone suffices, but the DOP-C02 exam tests the understanding that CloudFormation acts as a proxy, requiring the caller to have permissions for every resource it provisions.
Detailed technical explanation
How to think about this question
CloudFormation operates as a service that calls other AWS APIs on your behalf using the permissions of the IAM user or role that initiated the stack creation. This means the user must have explicit permissions for each resource action (e.g., ec2:RunInstances, s3:CreateBucket) in their IAM policy, even though the API call is to cloudformation:CreateStack. A common subtlety is that CloudFormation does not 'inherit' permissions; it requires the caller to have all necessary resource-level permissions upfront.
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.
Quick reference
AWS S3 Storage Class Comparison
Storage Class
Min Duration
Retrieval
Use Case
S3 Standard
None
Immediate
Frequently accessed data
S3 Standard-IA
30 days
Immediate
Infrequent access, rapid retrieval
S3 One Zone-IA
30 days
Immediate
Non-critical infrequent data
S3 Intelligent-Tiering
None
Immediate–hours
Unknown or changing access patterns
S3 Glacier Instant
90 days
Milliseconds
Archive with instant retrieval
S3 Glacier Flexible
90 days
Minutes–hours
Archive, flexible retrieval
S3 Glacier Deep Archive
180 days
Hours
Long-term compliance archive
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: ec2:RunInstances and s3:CreateBucket — To successfully create a CloudFormation stack that provisions an EC2 instance and an S3 bucket, the IAM user must have permissions for the actions that CloudFormation will perform on their behalf. Specifically, ec2:RunInstances and s3:CreateBucket are required in addition to cloudformation:CreateStack. The 'Access Denied' error occurs because the user lacks these resource-level permissions. Notably, the DeletionPolicy attribute (e.g., Retain) only controls behavior when resources are deleted, not during stack creation or updates; it does not affect the permissions required for provisioning.
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.
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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