The answer is a launch template name mismatch, where the name specified in the CloudFormation template is incorrect or does not exist in the account and Region. This causes the stack creation failure because CloudFormation resolves the launch template name at creation time as a required parameter for the Auto Scaling group; if the name does not match a pre-existing resource, the entire stack creation fails with a validation error. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of how CloudFormation validates resource dependencies during stack operations, often appearing as a trap where candidates overlook that launch template names are case-sensitive and must exactly match an existing template. A common memory tip is to think of launch templates as immutable references—CloudFormation does not create them for you, so a typo or missing template in the target Region will halt the stack immediately. Remember: if the name doesn’t match, the stack won’t launch.
DOP-C02 Resilient Cloud Solutions Practice Question
This DOP-C02 practice question tests your understanding of resilient cloud solutions. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Network Topology
A DevOps engineer ran the above command and saw this output. What is the MOST likely cause of the stack creation failure?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The launch template name specified in the CloudFormation template is incorrect or does not exist.
The error message indicates that the launch template name specified in the CloudFormation template does not match any existing launch template in the account and Region. CloudFormation resolves the launch template name at stack creation time; if the name is incorrect or the template does not exist, the Auto Scaling group creation fails with a validation error. This is the most direct cause because the launch template name is a required parameter that must reference a pre-existing resource.
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 key pair specified in the launch template does not exist.
Why it's wrong here
The error message does not mention a key pair.
✗
The IAM role does not have permission to create the Auto Scaling group.
Why it's wrong here
The error message does not mention permissions.
✗
The AMI ID specified in the launch template is not available in this Region.
Why it's wrong here
The error is about the launch template itself, not the AMI.
✓
The launch template name specified in the CloudFormation template is incorrect or does not exist.
Why this is correct
The error indicates the launch template parameter is not supported, likely due to a missing or incorrect name.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
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 confuse launch template validation errors with instance-level errors (like missing AMI or key pair), but CloudFormation validates the launch template name at the Auto Scaling group resource level before any EC2 instances are launched.
Detailed technical explanation
How to think about this question
When CloudFormation creates an Auto Scaling group, it validates the launch template specification by calling the EC2 DescribeLaunchTemplates API. If the specified name does not match any existing launch template, the API returns a 'InvalidLaunchTemplateName.NotFoundException' error, which CloudFormation surfaces as a stack creation failure. This validation occurs before any instance launch attempts, so the error is immediate and not related to AMI availability or key pairs. In real-world scenarios, this often happens when a launch template is deleted or renamed after the CloudFormation template is authored, or when a typo exists in the template parameter.
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.
Resilient Cloud Solutions — This question tests Resilient Cloud Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The launch template name specified in the CloudFormation template is incorrect or does not exist. — The error message indicates that the launch template name specified in the CloudFormation template does not match any existing launch template in the account and Region. CloudFormation resolves the launch template name at stack creation time; if the name is incorrect or the template does not exist, the Auto Scaling group creation fails with a validation error. This is the most direct cause because the launch template name is a required parameter that must reference a pre-existing resource.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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