The answer is to set MinimumHealthyHosts to a value requiring all instances and set IgnoreApplicationStopFailures to false. These two CodeDeploy settings work together to stop deployment on any instance failure: MinimumHealthyHosts defines the threshold for acceptable healthy hosts during deployment, so configuring it to 100% or a count equal to the total fleet ensures that if even one instance fails to install the application, the deployment is immediately halted. IgnoreApplicationStopFailures, when set to false, forces CodeDeploy to stop the entire deployment if the ApplicationStop lifecycle hook fails on any instance, preventing the deployment from continuing with a corrupted or inconsistent state. On the AWS Certified Developer Associate DVA-C02 exam, this tests your understanding of CodeDeploy’s deployment configuration and failure handling—a common trap is assuming only one setting controls this behavior, but both are required for a hard stop on any failure. Memory tip: think “All or Nothing”—set MinimumHealthyHosts to “all” and never ignore stop failures to ensure the deployment stops on any single instance failure.
DVA-C02 Deployment Practice Question
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 an application to EC2 instances. The developer wants to ensure that the deployment stops if any instance fails to install the application. Which TWO CodeDeploy settings should be configured to achieve this? (Choose TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set the 'IgnoreApplicationStopFailures' option to false in the deployment configuration.
Option B is correct because setting 'IgnoreApplicationStopFailures' to false ensures that if the application stop hook fails on any instance, the deployment stops immediately rather than continuing. This prevents the deployment from proceeding when an instance cannot properly stop the existing application, which could lead to conflicts or corrupted states.
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.
✗
Set the 'DeploymentStyle' to 'BLUE_GREEN'.
Why it's wrong here
Deployment style does not affect failure behavior.
✓
Set the 'IgnoreApplicationStopFailures' option to false in the deployment configuration.
Why this is correct
This ensures that failures in the ApplicationStop lifecycle event cause the deployment to fail.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure the 'LoadBalancerInfo' to include the target group.
Why it's wrong here
This is for load balancer integration, not for stopping on failure.
✗
Configure the 'RevisionLocation' to point to an S3 bucket.
Why it's wrong here
This is for specifying the source, not for failure handling.
✓
Set the 'MinimumHealthyHosts' option to a value that requires all instances to be healthy for the deployment to succeed.
Why this is correct
This ensures that if any instance is unhealthy, the deployment fails.
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 confuse deployment configuration settings like 'IgnoreApplicationStopFailures' and 'MinimumHealthyHosts' with unrelated settings such as deployment style or revision location, leading them to select options that control deployment strategy or artifact storage instead of failure behavior.
Detailed technical explanation
How to think about this question
Under the hood, CodeDeploy's 'MinimumHealthyHosts' setting uses a percentage or count to define the minimum number of hosts that must remain healthy during a deployment. Setting it to 100% (or the total number of instances) forces CodeDeploy to treat any instance failure as a deployment failure, because the healthy host threshold cannot be met. Combined with 'IgnoreApplicationStopFailures' set to false, this provides a two-layer safeguard: the deployment stops if any instance fails to stop the application or if any instance fails to install the new revision.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: Set the 'IgnoreApplicationStopFailures' option to false in the deployment configuration. — Option B is correct because setting 'IgnoreApplicationStopFailures' to false ensures that if the application stop hook fails on any instance, the deployment stops immediately rather than continuing. This prevents the deployment from proceeding when an instance cannot properly stop the existing application, which could lead to conflicts or corrupted states.
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.
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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