The correct answer is blue/green deployment with immutable infrastructure because it runs the new version (green) alongside the old (blue) behind the same load balancer, switching traffic only after health checks pass, which minimizes downtime and enables immediate rollback by simply routing traffic back to the blue environment without any redeployment. This approach leverages immutable infrastructure, meaning each version is deployed to fresh, unmodified instances, eliminating configuration drift and ensuring a clean, predictable environment for rollback. On the AWS Certified Developer Associate DVA-C02 exam, this scenario tests your understanding of CodeDeploy’s blue/green configuration within CodePipeline, often appearing as a trap where candidates mistakenly choose in-place rolling updates—which lack instant rollback and risk downtime. A common memory tip is “Blue stays, green plays; if green fails, blue sails,” reminding you that the old environment remains untouched as a safety net.
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.
An e-commerce platform uses AWS CodePipeline to deploy a web application to an Auto Scaling group behind an Application Load Balancer. The deployment strategy must minimize downtime and allow immediate rollback if the new version fails health checks. Which deployment configuration meets these requirements?
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use blue/green deployment with an immutable infrastructure.
Blue/green deployment with immutable infrastructure minimizes downtime by running the new version (green) alongside the old (blue) and switching traffic only after health checks pass. If the new version fails, rollback is immediate by routing traffic back to the blue environment without redeploying. AWS CodePipeline supports this via CodeDeploy with a blue/green configuration, ensuring zero-downtime deployments and instant rollback capability.
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.
✓
Use blue/green deployment with an immutable infrastructure.
Why this is correct
Creates a new environment, switches traffic when healthy, and retains the old environment for instant rollback.
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.
✗
Use all-at-once deployment to the Auto Scaling group.
Why it's wrong here
Replaces all instances at once, causing downtime until new instances pass health checks.
✗
Use canary deployment shifting 10% traffic for 5 minutes.
Why it's wrong here
Canary is gradual; immediate rollback requires manual intervention.
✗
Use in-place rolling update with a batch size of 50%.
Why it's wrong here
In-place updates can cause downtime and rollback requires redeploying the old version.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse canary or rolling updates with immediate rollback capability, but only blue/green provides an instant traffic switch without redeployment, as the old environment remains intact.
Detailed technical explanation
How to think about this question
Blue/green deployment in AWS CodeDeploy uses an Auto Scaling group for the green environment, which is created from a new launch template or configuration. Traffic is switched at the Application Load Balancer using a target group swap, which is atomic and takes effect within seconds. Immutable infrastructure ensures the green environment is a fresh set of instances, avoiding configuration drift and enabling a clean rollback by simply reverting the target group to the blue environment.
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: Use blue/green deployment with an immutable infrastructure. — Blue/green deployment with immutable infrastructure minimizes downtime by running the new version (green) alongside the old (blue) and switching traffic only after health checks pass. If the new version fails, rollback is immediate by routing traffic back to the blue environment without redeploying. AWS CodePipeline supports this via CodeDeploy with a blue/green configuration, ensuring zero-downtime deployments and instant rollback capability.
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: "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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A developer wants to deploy a new version of an application to an EC2 Auto Scaling group using AWS CodeDeploy. The developer wants to minimize downtime and ensure that if the deployment fails, it automatically rolls back to the previous version. Which deployment type should the developer choose?
easy
A.In-place
✓ B.Blue/green
C.Canary
D.Linear
Why B: Blue/green deployment is the correct choice because it creates a separate, new Auto Scaling group (green) alongside the existing one (blue), allowing traffic to be shifted to the new environment after validation. This minimizes downtime by keeping the old environment fully operational during the deployment, and CodeDeploy can automatically roll back by redirecting traffic to the blue environment if the deployment fails.
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.