This DVA-C02 practice question tests your understanding of deployment. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
Exhibit
Refer to the exhibit. Output from aws cloudformation describe-stacks:
{
"Stacks": [
{
"StackName": "my-stack",
"StackStatus": "ROLLBACK_COMPLETE",
"CreationTime": "2024-01-15T10:00:00Z",
"LastUpdatedTime": "2024-01-15T10:05:00Z",
"StackStatusReason": "The following resource(s) failed to create: [WaitCondition]. The following resource(s) failed to create: [EC2Instance]. . Rollback requested by user."
}
]
}
A developer attempted to create a CloudFormation stack. The stack creation failed and rolled back. Based on the exhibit, which resource caused the failure?
Refer to the exhibit. Output from aws cloudformation describe-stacks:
{
"Stacks": [
{
"StackName": "my-stack",
"StackStatus": "ROLLBACK_COMPLETE",
"CreationTime": "2024-01-15T10:00:00Z",
"LastUpdatedTime": "2024-01-15T10:05:00Z",
"StackStatusReason": "The following resource(s) failed to create: [WaitCondition]. The following resource(s) failed to create: [EC2Instance]. . Rollback requested by user."
}
]
}
A
The WaitCondition resource
Why wrong: WaitCondition failed due to EC2Instance failure.
B
The EC2Instance resource
The error states 'The following resource(s) failed to create: [EC2Instance]'.
C
The user who requested the rollback
Why wrong: The rollback was triggered automatically.
D
The stack itself
Why wrong: The stack failed because of a resource failure.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The EC2Instance resource
The error message indicates that EC2Instance failed to create, and that caused the WaitCondition to fail. Option A is correct because EC2Instance is listed as failed. Option B is incorrect because WaitCondition failed as a consequence. Option C is incorrect because the stack status is ROLLBACK_COMPLETE. Option D is incorrect because the rollback was automatic.
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 WaitCondition resource
Why it's wrong here
WaitCondition failed due to EC2Instance failure.
✓
The EC2Instance resource
Why this is correct
The error states 'The following resource(s) failed to create: [EC2Instance]'.
Related concept
Read the scenario before looking for a memorised answer.
✗
The user who requested the rollback
Why it's wrong here
The rollback was triggered automatically.
✗
The stack itself
Why it's wrong here
The stack failed because of a resource failure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The EC2Instance resource — The error message indicates that EC2Instance failed to create, and that caused the WaitCondition to fail. Option A is correct because EC2Instance is listed as failed. Option B is incorrect because WaitCondition failed as a consequence. Option C is incorrect because the stack status is ROLLBACK_COMPLETE. Option D is incorrect because the rollback was automatic.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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