DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 to manage its infrastructure. The DevOps team notices that stack updates sometimes fail because of resource conflicts. The team wants to prevent concurrent updates to the same stack. 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
✓
No action needed; CloudFormation already prevents concurrent stack updates
AWS CloudFormation inherently prevents concurrent updates to the same stack. When an update operation is initiated, CloudFormation places a lock on the stack, rejecting any subsequent update requests until the current operation completes. This behavior is built into the service and requires no additional configuration, making option C correct.
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.
✗
Use an AWS Organizations service control policy to restrict updates
Why it's wrong here
SCPs are for organizational boundaries, not needed for this.
✗
Create an IAM policy that denies cloudformation:UpdateStack if a stack update is in progress
Why it's wrong here
IAM policies cannot conditionally deny based on stack update status.
✓
No action needed; CloudFormation already prevents concurrent stack updates
Why this is correct
CloudFormation automatically serializes updates to the same stack.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable CloudTrail to log all stack update attempts and manually review
Why it's wrong here
Logging does not prevent concurrent updates.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates overthink the problem and assume they need to implement custom concurrency controls (like IAM policies or SCPs), when in fact CloudFormation already handles this natively, making the 'no action needed' answer the correct one.
Detailed technical explanation
How to think about this question
Under the hood, CloudFormation uses a stack-level mutex that is held for the duration of a create, update, or delete operation. If a second update request arrives, the API returns a `ValidationError` with the message 'Stack [stack-name] is in UPDATE_IN_PROGRESS state and can not be updated.' This lock is automatically released when the operation completes or fails, ensuring serial execution without any custom scripting or external tools.
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: No action needed; CloudFormation already prevents concurrent stack updates — AWS CloudFormation inherently prevents concurrent updates to the same stack. When an update operation is initiated, CloudFormation places a lock on the stack, rejecting any subsequent update requests until the current operation completes. This behavior is built into the service and requires no additional configuration, making option C correct.
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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