- A
Run ECS tasks on On-Demand EC2 instances
Why wrong: ECS on EC2 still requires the team to provision, patch, and manage the underlying EC2 container instances. This does not eliminate server management.
- B
Use AWS Fargate as the ECS launch type
Fargate removes the need to manage EC2 instances. The team defines CPU and memory requirements for each container, and AWS provisions and manages the underlying compute automatically.
- C
Use AWS Lambda to run the containers
Why wrong: Lambda runs code functions, not Docker containers (except via custom runtimes for very specific use cases). It is not a general container orchestration solution.
- D
Run ECS tasks on Reserved EC2 instances
Why wrong: Reserved Instances are a billing option for EC2, not a deployment model. Using Reserved Instances still requires managing the EC2 container host infrastructure.
Quick Answer
The answer is to use AWS Fargate as the ECS launch type. This is correct because Fargate is a serverless compute engine for containers that eliminates the need to manage EC2 instances; when you select Fargate as the launch type for your ECS tasks, AWS automatically handles provisioning, patching, and capacity planning for the underlying hosts, directly meeting the operations team’s goal of stopping server management. On the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of the difference between the EC2 launch type (where you manage instances) and the Fargate launch type (serverless), and a common trap is confusing Fargate with Lambda—remember, Fargate is for containers, not functions. A helpful memory tip: “Fargate Frees you from the Fleet”—if you want to stop managing servers for containers, think Fargate.
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. 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 company runs containerised microservices using Amazon ECS. The operations team wants to stop managing EC2 instances, including patching and capacity planning for the container hosts. Which option allows them to run containers on ECS without managing servers?
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
Use AWS Fargate as the ECS launch type
AWS Fargate is a serverless compute engine for containers that works with Amazon ECS. When you use Fargate as the launch type, you no longer need to provision, patch, or manage EC2 instances; AWS handles the underlying infrastructure, including capacity planning and OS patching. This directly meets the operations team's requirement to stop managing servers.
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.
- ✗
Run ECS tasks on On-Demand EC2 instances
Why it's wrong here
ECS on EC2 still requires the team to provision, patch, and manage the underlying EC2 container instances. This does not eliminate server management.
- ✓
Use AWS Fargate as the ECS launch type
Why this is correct
Fargate removes the need to manage EC2 instances. The team defines CPU and memory requirements for each container, and AWS provisions and manages the underlying compute automatically.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use AWS Lambda to run the containers
Why it's wrong here
Lambda runs code functions, not Docker containers (except via custom runtimes for very specific use cases). It is not a general container orchestration solution.
- ✗
Run ECS tasks on Reserved EC2 instances
Why it's wrong here
Reserved Instances are a billing option for EC2, not a deployment model. Using Reserved Instances still requires managing the EC2 container host infrastructure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the pricing model (Reserved Instances) with the compute management model, or they think Lambda can fully replace ECS for containerised microservices, not realising Fargate is the serverless compute option specifically designed for ECS.
Detailed technical explanation
How to think about this question
Fargate abstracts the host operating system, kernel, and container runtime from the user, allowing you to specify only the CPU and memory requirements per task. Under the hood, Fargate uses a lightweight VM (microVM) based on Firecracker, which provides strong isolation between tasks while eliminating the need for host-level patching. In a real-world scenario, a team migrating from EC2-based ECS to Fargate can reduce operational overhead by automating scaling policies with Application Auto Scaling, which adjusts the number of running tasks based on CloudWatch metrics without any EC2 instance management.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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.
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS Fargate as the ECS launch type — AWS Fargate is a serverless compute engine for containers that works with Amazon ECS. When you use Fargate as the launch type, you no longer need to provision, patch, or manage EC2 instances; AWS handles the underlying infrastructure, including capacity planning and OS patching. This directly meets the operations team's requirement to stop managing servers.
What should I do if I get this CLF-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
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Last reviewed: Jun 11, 2026
This CLF-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 CLF-C02 exam.
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