This DVA-C02 practice question tests your understanding of deployment. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 company uses AWS OpsWorks for configuration management. They have a stack with multiple layers. They want to deploy a new application version to the application layer using rolling updates. What is the correct way to achieve this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Update the app with the new version and run the 'deploy' command on the stack.
Option C is correct because in AWS OpsWorks, deploying a new application version to a layer is done by updating the app configuration with the new version and then running the 'deploy' command on the stack. This command triggers the built-in Chef deploy recipes on the layer's instances, performing a rolling update that installs the new application version while minimizing downtime. The 'deploy' lifecycle event is specifically designed for application deployment, unlike 'setup' which configures the instance's initial state.
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.
✗
Update the custom cookbook and run the 'setup' command on the layer.
Why it's wrong here
Setup runs the cookbook recipes, not app deployment.
✗
Clone the stack and then delete the old stack.
Why it's wrong here
This creates a new stack, not a rolling update.
✓
Update the app with the new version and run the 'deploy' command on the stack.
Why this is correct
The deploy command updates the app on all instances according to the deployment strategy.
Related concept
Read the scenario before looking for a memorised answer.
✗
Modify the Auto Scaling group to launch new instances with the updated app.
Why it's wrong here
Auto Scaling does not automatically deploy new app versions.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing the 'setup' lifecycle event (used for initial configuration) with the 'deploy' lifecycle event (used for application deployment), leading candidates to incorrectly choose Option A instead of C.
Detailed technical explanation
How to think about this question
Under the hood, OpsWorks uses Chef to execute lifecycle events (setup, configure, deploy, undeploy, shutdown) on each instance. The 'deploy' command triggers the deploy recipes defined in the layer's custom cookbook or the built-in app deployment recipes, which handle tasks like extracting the app archive, updating symlinks, and restarting the application server. In a rolling update, OpsWorks sequentially deploys to instances in the layer, respecting the 'deployment' settings such as batch size and pause time, which is critical for zero-downtime deployments in production environments.
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 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 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: Update the app with the new version and run the 'deploy' command on the stack. — Option C is correct because in AWS OpsWorks, deploying a new application version to a layer is done by updating the app configuration with the new version and then running the 'deploy' command on the stack. This command triggers the built-in Chef deploy recipes on the layer's instances, performing a rolling update that installs the new application version while minimizing downtime. The 'deploy' lifecycle event is specifically designed for application deployment, unlike 'setup' which configures the instance's initial state.
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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