- A
UpdatePolicy attribute with AutoScalingRollingUpdate
Correct. The `UpdatePolicy` with `AutoScalingRollingUpdate` allows you to specify parameters that ensure new instances are created and healthy before old ones are terminated, providing create-before-destroy behavior for Auto Scaling groups.
- B
CreationPolicy attribute with CreateBeforeDestroy
Why wrong: Incorrect. The `CreationPolicy` attribute does not have a `CreateBeforeDestroy` property. It is used to wait for a signal from the resource after creation, not to control the order of replacement during updates.
- C
DeletionPolicy attribute set to Retain
Why wrong: Incorrect. The `DeletionPolicy` attribute set to `Retain` preserves the resource when the stack is deleted, not during an update. It does not ensure create-before-destroy.
- D
DependsOn attribute to specify creation order
Why wrong: Incorrect. The `DependsOn` attribute only specifies creation order, not replacement behavior. It cannot ensure the new resource is tested before the old one is deleted.
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 DevOps team is using AWS CloudFormation to manage a multi-tier application. They want to ensure that when an update to the stack causes a resource replacement, the replacement occurs only after the new resource is fully created and tested. Which CloudFormation feature should they use?
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
UpdatePolicy attribute with AutoScalingRollingUpdate
Option A is correct because the `UpdatePolicy` attribute with `AutoScalingRollingUpdate` can be configured to ensure that new instances are created and fully operational before old instances are terminated, effectively achieving create-before-destroy behavior for Auto Scaling groups. This is done by setting `MinInstancesInService` or using `PauseTime` to allow testing. Option B is incorrect because the `CreationPolicy` attribute does not have a `CreateBeforeDestroy` property; it is used to wait for creation signals, not to control replacement order during updates.
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.
- ✓
UpdatePolicy attribute with AutoScalingRollingUpdate
Why this is correct
Correct. The `UpdatePolicy` with `AutoScalingRollingUpdate` allows you to specify parameters that ensure new instances are created and healthy before old ones are terminated, providing create-before-destroy behavior for Auto Scaling groups.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
CreationPolicy attribute with CreateBeforeDestroy
Why it's wrong here
Incorrect. The `CreationPolicy` attribute does not have a `CreateBeforeDestroy` property. It is used to wait for a signal from the resource after creation, not to control the order of replacement during updates.
- ✗
DeletionPolicy attribute set to Retain
Why it's wrong here
Incorrect. The `DeletionPolicy` attribute set to `Retain` preserves the resource when the stack is deleted, not during an update. It does not ensure create-before-destroy.
- ✗
DependsOn attribute to specify creation order
Why it's wrong here
Incorrect. The `DependsOn` attribute only specifies creation order, not replacement behavior. It cannot ensure the new resource is tested before the old one is deleted.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap lies in remembering that `CreationPolicy` is for waiting after creation, not for ordering replacement. Candidates often confuse it with `UpdatePolicy`, which actually handles rolling updates and replacement sequencing for supported resources like Auto Scaling groups.
Detailed technical explanation
How to think about this question
Under the hood, `CreationPolicy` with `CreateBeforeDestroy` works by instructing CloudFormation to provision the new resource first, wait for the specified number of success signals (e.g., via `cfn-signal` or a wait condition), and only then proceed to delete the old resource. This is critical for stateful resources like databases or EBS volumes where immediate replacement would cause data loss; the policy ensures the new resource is healthy before the old one is removed, and if the new resource fails, the update is rolled back without deleting the original.
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.
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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: UpdatePolicy attribute with AutoScalingRollingUpdate — Option A is correct because the `UpdatePolicy` attribute with `AutoScalingRollingUpdate` can be configured to ensure that new instances are created and fully operational before old instances are terminated, effectively achieving create-before-destroy behavior for Auto Scaling groups. This is done by setting `MinInstancesInService` or using `PauseTime` to allow testing. Option B is incorrect because the `CreationPolicy` attribute does not have a `CreateBeforeDestroy` property; it is used to wait for creation signals, not to control replacement order during updates.
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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