- A
The deployment group is not associated with any Auto Scaling group.
Why wrong: Auto Scaling group is optional.
- B
The deployment configuration requires too many healthy hosts.
Why wrong: Minimum of 1 is reasonable.
- C
The CodeDeploy agent is not installed on the instances.
Why wrong: Agent issue is per instance, not group.
- D
The deployment group does not have any Amazon EC2 instances registered.
No instances means no healthy hosts.
Question 987 of 1,616
CodeDeploy Deployment Fails – No Instances in Deployment Group
This DVA-C02 practice question tests your understanding of deployment. 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.
A developer is using AWS CodeDeploy to deploy a revision to an EC2/On-Premises deployment group. The deployment fails because the specified deployment configuration requires a minimum of 1 healthy host, but the deployment group has 0 instances. What is the most likely cause?
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.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
✓
The deployment group does not have any Amazon EC2 instances registered.
The deployment failed because the deployment group had zero registered instances, making it impossible to meet the minimum of 1 healthy host required by the deployment configuration. Option D is correct because the error message directly indicates that the deployment group contains no EC2 instances, so there are no hosts to deploy to.
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 deployment group is not associated with any Auto Scaling group.
Why it's wrong here
Auto Scaling group is optional.
- ✗
The deployment configuration requires too many healthy hosts.
Why it's wrong here
Minimum of 1 is reasonable.
- ✗
The CodeDeploy agent is not installed on the instances.
Why it's wrong here
Agent issue is per instance, not group.
- ✓
The deployment group does not have any Amazon EC2 instances registered.
Why this is correct
No instances means no healthy hosts.
Clue confirmation
The clue words "most likely", "minimum / minimize" 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 often assume the error is due to a missing CodeDeploy agent or an Auto Scaling group requirement, but the specific error message 'minimum of 1 healthy host' with '0 instances' directly points to an empty deployment group.
Detailed technical explanation
How to think about this question
Under the hood, CodeDeploy checks the deployment group's instance inventory before starting the deployment. If the group has zero instances (whether EC2, on-premises, or from an Auto Scaling group), the deployment immediately fails with the 'minimum of 1 healthy host' error because there are no targets to apply the revision to. This is a common scenario when a developer creates a deployment group but forgets to register any instances or associate an Auto Scaling group, or when all instances have been terminated.
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.
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
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 deployment group does not have any Amazon EC2 instances registered. — The deployment failed because the deployment group had zero registered instances, making it impossible to meet the minimum of 1 healthy host required by the deployment configuration. Option D is correct because the error message directly indicates that the deployment group contains no EC2 instances, so there are no hosts to deploy to.
What should I do if I get this DVA-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", "minimum / minimize". 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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Last reviewed: Jul 4, 2026
This DVA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DVA-C02 exam.
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