The correct answer is to update the ECS service with a new task definition while setting the minimum healthy percent to 100 and the maximum percent to 200. This configuration, often paired with a blue/green deployment strategy, allows the ECS Fargate service to launch the full set of new tasks (up to 200% of the desired count) before terminating any old tasks, ensuring that traffic is never routed to a reduced-capacity fleet. On the AWS Certified Developer Associate DVA-C02 exam, this question tests your understanding of rolling update strategies and the deployment circuit breaker, with a common trap being the impulse to stop all tasks first or delete and recreate the service, both of which cause downtime. The key insight is that ECS Fargate deployments minimize downtime by maintaining full capacity throughout the update, not by reducing it. Remember the memory tip: "200% to grow, 100% to keep the flow"—meaning you double capacity temporarily to avoid any service interruption.
DVA-C02 Deployment Practice Question
This DVA-C02 practice question tests your understanding of deployment. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which TWO actions should a developer take to minimize downtime when deploying a new version of a production application running on Amazon ECS with Fargate?
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
✓
Configure the ECS service to use a blue/green deployment with CodeDeploy
Using a blue/green deployment (A) and updating the ECS service with a new task definition while setting the minimum healthy percent to 100% and maximum percent to 200% (B) both reduce downtime. Option C (delete and recreate) causes downtime. Option D (update target group) is part of blue/green but not a complete action. Option E (stop all tasks) causes downtime.
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.
✗
Delete the existing service and recreate it with the new task definition
Why it's wrong here
Deleting the service causes downtime.
✓
Configure the ECS service to use a blue/green deployment with CodeDeploy
Why this is correct
Blue/green deployments switch traffic after new version is ready.
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.
✗
Update the target group health check settings to a more lenient threshold
Why it's wrong here
This does not directly affect deployment downtime.
✗
Stop all running tasks and then start new tasks with the updated image
Why it's wrong here
Stopping all tasks causes downtime.
✓
Update the ECS service with a new task definition and set minimum healthy percent to 100 and maximum percent to 200
Why this is correct
This allows new tasks to start before old ones are stopped.
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
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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: Configure the ECS service to use a blue/green deployment with CodeDeploy — Using a blue/green deployment (A) and updating the ECS service with a new task definition while setting the minimum healthy percent to 100% and maximum percent to 200% (B) both reduce downtime. Option C (delete and recreate) causes downtime. Option D (update target group) is part of blue/green but not a complete action. Option E (stop all tasks) causes downtime.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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 →
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.