CLF-C02 Cloud Technology and Services Practice Question
A company wants to run containerized applications without managing the underlying EC2 instances or clusters. Which AWS service enables this?
⚠ Common exam trap
Many candidates confuse Amazon ECS on EC2 (which still requires instance management) with AWS Fargate (which is serverless), or they incorrectly assume AWS Lambda can run any containerized application despite its execution time and resource constraints.
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 Fargate
AWS Fargate is a serverless compute engine for containers that allows you to run containerized applications without managing the underlying EC2 instances or clusters. You define your task definitions and Fargate automatically provisions and scales the compute infrastructure, abstracting away the need to handle instance patching, capacity planning, or cluster management.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon EC2 with Docker installed
Why it's wrong here
Installing Docker on an EC2 instance still requires full lifecycle management of that instance, including OS patching, security updates, and manual configuration of the Docker daemon. You are responsible for cluster orchestration, capacity planning, and high availability, which is operationally heavy and far from a serverless model. This option fails when the goal is minimal infrastructure management.
- ✗
Amazon ECS on EC2
Why it's wrong here
Amazon ECS on EC2 is a managed container orchestration service, but the underlying EC2 instances in the cluster remain your responsibility. You must provision, patch, scale, and maintain the instance fleet, and you are still exposed to instance failures and capacity constraints. ECS handles the orchestration, but it does not deliver the serverless experience that removes infrastructure management.
- ✓
AWS Fargate
Why this is correct
Fargate is a serverless compute engine for containers that removes all EC2 instance management, allowing developers to define only container requirements such as CPU and memory. Fargate automatically provisions, scales, and patches the underlying infrastructure invisibly, making it ideal for running containerized applications without operational overhead. You never see or manage the host instances.
- ✗
AWS Lambda
Why it's wrong here
Lambda executes code as short-lived, event-driven functions rather than running containers with persistent processes. Even when code is packaged as a container image, Lambda runs it as a function with a timeout and does not provide the full container runtime environment expected by arbitrary applications. Containerized applications that need long-running processes or specific container capabilities are not a fit for Lambda.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.