- A
The deployment configuration timeout is too short.
Why wrong: Would cause a timeout error.
- B
The CodeDeploy service role does not have sufficient permissions.
Why wrong: Would cause an authorization error.
- C
The instances are not running the CodeDeploy agent.
Why wrong: Would cause a specific error about agent not found.
- D
More than 25% of the instances failed the deployment.
The minimum healthy instances threshold was breached.
Question 1,425 of 1,750
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. 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.
During a deployment using AWS CodeDeploy, the deployment fails with the error 'The overall deployment failed because too many individual instances failed deployment, too few healthy instances are available, or some instances in your deployment group are experiencing problems.' The deployment group is configured with a minimum healthy instances of 75%. What could be the cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
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
✓
More than 25% of the instances failed the deployment.
The error message explicitly states that too many individual instances failed deployment and too few healthy instances are available. With a minimum healthy instances setting of 75%, the deployment fails when more than 25% of the instances in the deployment group fail their deployment. This is a built-in safety mechanism in AWS CodeDeploy to prevent cascading failures and ensure application availability.
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 configuration timeout is too short.
Why it's wrong here
Would cause a timeout error.
- ✗
The CodeDeploy service role does not have sufficient permissions.
Why it's wrong here
Would cause an authorization error.
- ✗
The instances are not running the CodeDeploy agent.
Why it's wrong here
Would cause a specific error about agent not found.
- ✓
More than 25% of the instances failed the deployment.
Why this is correct
The minimum healthy instances threshold was breached.
Clue confirmation
The clue word "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 may confuse the 'minimum healthy instances' threshold with other deployment configuration settings like timeout values or agent health, when in fact the error message directly indicates that the threshold of 75% healthy instances was breached because more than 25% of instances failed.
Detailed technical explanation
How to think about this question
AWS CodeDeploy uses the 'minimum healthy instances' configuration to control deployment safety. This value can be set as an absolute number or a percentage (e.g., 75%). During a deployment, CodeDeploy monitors the ratio of healthy instances to total instances in the deployment group. If the number of failed instances causes the healthy count to drop below the configured threshold, CodeDeploy immediately stops the deployment and marks it as failed. This is particularly important in blue/green deployments or rolling updates where maintaining capacity is critical.
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 DOP-C02 question test?
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: More than 25% of the instances failed the deployment. — The error message explicitly states that too many individual instances failed deployment and too few healthy instances are available. With a minimum healthy instances setting of 75%, the deployment fails when more than 25% of the instances in the deployment group fail their deployment. This is a built-in safety mechanism in AWS CodeDeploy to prevent cascading failures and ensure application availability.
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: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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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