- A
AWS::ECS::Service
Why wrong: This resource runs tasks in a cluster, not the cluster itself.
- B
AWS::ECS::TaskDefinition
Why wrong: This defines the container configuration.
- C
AWS::ECS::ContainerInstance
Why wrong: There is no such CloudFormation resource.
- D
AWS::ECS::Cluster
This resource defines an ECS cluster.
Question 1,136 of 1,750
Defining an Amazon ECS Cluster in CloudFormation
This DOP-C02 practice question tests your understanding of sdlc automation. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 DevOps engineer needs to automate the creation of an Amazon ECS cluster using AWS CloudFormation. The cluster will run a web application that requires a load balancer. Which resource should be used to define the ECS cluster?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS::ECS::Cluster
The AWS::ECS::Cluster resource is the correct CloudFormation resource to define an ECS cluster, which serves as the logical grouping of container instances or Fargate tasks. The question specifically asks for the resource that defines the cluster itself, not the services or tasks running within it. A load balancer can be associated with the cluster via an AWS::ECS::Service resource, but the cluster definition is solely handled by AWS::ECS::Cluster.
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.
- ✗
AWS::ECS::Service
Why it's wrong here
This resource runs tasks in a cluster, not the cluster itself.
- ✗
AWS::ECS::TaskDefinition
Why it's wrong here
This defines the container configuration.
- ✗
AWS::ECS::ContainerInstance
Why it's wrong here
There is no such CloudFormation resource.
- ✓
AWS::ECS::Cluster
Why this is correct
This resource defines an ECS cluster.
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 confuse the resource that defines the cluster (AWS::ECS::Cluster) with the resource that runs tasks and attaches a load balancer (AWS::ECS::Service), leading them to select the service option when the question only asks for the cluster definition.
Detailed technical explanation
How to think about this question
Under the hood, an ECS cluster is a regional resource that acts as a namespace for task and service definitions; it can be created with an empty configuration and later populated with capacity providers (e.g., Fargate or EC2). In real-world scenarios, you might use AWS::ECS::Cluster with a ClusterSettings property to enable Container Insights for monitoring, or with a Configuration property to set execute command logging. The cluster itself does not handle load balancing—that is delegated to the service resource which references a target group.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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.
- →
SDLC Automation — study guide chapter
Learn the concepts, then practise the questions
- →
SDLC Automation practice questions
Targeted practice on this topic area only
- →
All DOP-C02 questions
1,750 questions across all exam domains
- →
AWS Certified DevOps Engineer Professional DOP-C02 study guide
Full concept coverage aligned to exam objectives
- →
DOP-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related DOP-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Configuration Management and IaC practice questions
Practise DOP-C02 questions linked to Configuration Management and IaC.
Resilient Cloud Solutions practice questions
Practise DOP-C02 questions linked to Resilient Cloud Solutions.
Monitoring and Logging practice questions
Practise DOP-C02 questions linked to Monitoring and Logging.
Incident and Event Response practice questions
Practise DOP-C02 questions linked to Incident and Event Response.
Security and Compliance practice questions
Practise DOP-C02 questions linked to Security and Compliance.
SDLC Automation practice questions
Practise DOP-C02 questions linked to SDLC Automation.
DOP-C02 fundamentals practice questions
Practise DOP-C02 questions linked to DOP-C02 fundamentals.
DOP-C02 scenario practice questions
Practise DOP-C02 questions linked to DOP-C02 scenario.
DOP-C02 troubleshooting practice questions
Practise DOP-C02 questions linked to DOP-C02 troubleshooting.
Practice this exam
Start a free DOP-C02 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this DOP-C02 question test?
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: AWS::ECS::Cluster — The AWS::ECS::Cluster resource is the correct CloudFormation resource to define an ECS cluster, which serves as the logical grouping of container instances or Fargate tasks. The question specifically asks for the resource that defines the cluster itself, not the services or tasks running within it. A load balancer can be associated with the cluster via an AWS::ECS::Service resource, but the cluster definition is solely handled by AWS::ECS::Cluster.
What should I do if I get this DOP-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.
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 →
Keep practising
More DOP-C02 practice questions
- A company uses AWS CodePipeline with a multi-branch strategy. A new feature branch triggers a pipeline that runs unit te…
- A development team uses AWS CodeBuild to compile a Java application and run unit tests. The build takes 30 minutes, but…
- A company uses AWS CodePipeline with multiple stages: Source (Amazon S3), Build (AWS CodeBuild), and Deploy (AWS CodeDep…
- A company uses AWS CodeCommit for source control. Developers frequently push large binary files (e.g., compiled JARs) to…
- A company runs a Stateful application on EC2 that requires sticky sessions. They use an ALB with duration-based stickine…
- An organization uses AWS CodePipeline to orchestrate deployments to multiple environments (dev, test, prod). Each enviro…
Last reviewed: Jul 4, 2026
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
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.