- A
Use a canary deployment strategy by updating only a subset of accounts first
Why wrong: StackSets do not have a built-in canary deployment feature; you would need manual steps.
- B
Set a failure tolerance to allow a certain number of stack operation failures before the overall operation fails
Failure tolerance allows you to specify how many stack instance failures are acceptable.
- C
Pause stack instances manually if errors are detected
Why wrong: Manual pausing is not supported; you rely on failure tolerance and rollback.
- D
Configure region concurrency to control how many regions are updated at a time
You can choose to update regions sequentially or in parallel.
- E
Set the maximum concurrent accounts to control how many accounts are updated simultaneously
Concurrent accounts limit the number of accounts being updated at once.
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.
A company uses AWS CloudFormation StackSets to deploy resources across multiple accounts and regions. They need to ensure that updates to the stack set are rolled out in a controlled manner, with the ability to roll back if errors occur. Which THREE strategies should they implement? (Choose THREE.)
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
Set a failure tolerance to allow a certain number of stack operation failures before the overall operation fails
Option B is correct because AWS CloudFormation StackSets allows you to set a failure tolerance, which specifies the number or percentage of stack operation failures that can occur in a region before the overall operation is considered failed. This enables controlled rollouts by allowing a limited number of failures to be tolerated, after which the operation stops and can be rolled back, preventing widespread impact.
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 a canary deployment strategy by updating only a subset of accounts first
Why it's wrong here
StackSets do not have a built-in canary deployment feature; you would need manual steps.
- ✓
Set a failure tolerance to allow a certain number of stack operation failures before the overall operation fails
Why this is correct
Failure tolerance allows you to specify how many stack instance failures are acceptable.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Pause stack instances manually if errors are detected
Why it's wrong here
Manual pausing is not supported; you rely on failure tolerance and rollback.
- ✓
Configure region concurrency to control how many regions are updated at a time
Why this is correct
You can choose to update regions sequentially or in parallel.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Set the maximum concurrent accounts to control how many accounts are updated simultaneously
Why this is correct
Concurrent accounts limit the number of accounts being updated at once.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the canary deployment concept (Option A) with StackSets' ability to target specific accounts or OUs, but StackSets does not natively support canary rollouts—you would need to implement that manually with separate stack sets or custom automation.
Detailed technical explanation
How to think about this question
Under the hood, StackSets uses a regional operation coordinator that manages concurrency and failure tolerance per region. The failure tolerance is applied per region, meaning if you set a failure tolerance of 1, the operation will continue in that region until 2 failures occur, then the entire regional operation fails. This is critical in multi-account environments where transient errors (e.g., API throttling) may occur, and a low failure tolerance prevents cascading failures while allowing some resilience.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
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: Set a failure tolerance to allow a certain number of stack operation failures before the overall operation fails — Option B is correct because AWS CloudFormation StackSets allows you to set a failure tolerance, which specifies the number or percentage of stack operation failures that can occur in a region before the overall operation is considered failed. This enables controlled rollouts by allowing a limited number of failures to be tolerated, after which the operation stops and can be rolled back, preventing widespread impact.
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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Last reviewed: Jul 4, 2026
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