The correct answer is to update the ECS service configuration to increase the maximum number of tasks. This error occurs because the ECS service has hit its configured task count ceiling, which prevents CodeDeploy from creating new tasks during a rolling update or blue/green deployment. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of ECS service limits versus CodeDeploy or Auto Scaling constraints—a common trap is confusing this with a CodeDeploy deployment limit or a resource-based scaling policy. Remember that CodeDeploy itself does not impose a task limit; the error is purely an ECS service-level cap. A helpful memory tip: "Max tasks is an ECS service setting, not a deployment or scaling policy."
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.
A company uses AWS CodePipeline to deploy a microservices application to Amazon ECS. The pipeline has a source stage (CodeCommit), a build stage (CodeBuild), and a deploy stage (CodeDeploy). Recently, deployments have been failing intermittently during the deploy stage with the error: 'The service has reached its maximum number of running tasks.' How should a DevOps engineer resolve this issue?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Update the ECS service configuration to increase the maximum number of tasks
Option B is correct because the error indicates that the ECS service's desired count or maximum tasks limit has been reached. Updating the service to increase the maximum number of tasks resolves the issue. Option A is wrong because CodeDeploy does not have a deployment limit that causes this error. Option C is wrong because scaling policies are for auto scaling, not for the error about maximum tasks. Option D is wrong because the issue is not related to insufficient memory but to task count limits.
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.
✗
Increase the memory reservation for the task definition
Why it's wrong here
Memory does not affect the number of running tasks limit.
✓
Update the ECS service configuration to increase the maximum number of tasks
Why this is correct
Directly resolves the error by allowing more tasks.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure an Amazon ECS Service Auto Scaling policy to scale out
Why it's wrong here
Auto scaling adjusts desired count based on metrics, but the error indicates the maximum limit has been hit.
✗
Increase the number of concurrent deployments allowed in CodeDeploy
Why it's wrong here
CodeDeploy does not limit running tasks; this is an ECS service limit.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Identify which DOP-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.
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: Update the ECS service configuration to increase the maximum number of tasks — Option B is correct because the error indicates that the ECS service's desired count or maximum tasks limit has been reached. Updating the service to increase the maximum number of tasks resolves the issue. Option A is wrong because CodeDeploy does not have a deployment limit that causes this error. Option C is wrong because scaling policies are for auto scaling, not for the error about maximum tasks. Option D is wrong because the issue is not related to insufficient memory but to task count limits.
What should I do if I get this DOP-C02 question wrong?
Identify which DOP-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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This DOP-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 DOP-C02 exam.
Question Discussion
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