CLF-C02 Cloud Technology and Services Practice Question

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 Lambda

  Why it's wrong here

  AWS Lambda is a serverless compute service that executes code in response to events, and although it supports packaging functions as OCI-compatible container images, it does not run arbitrary long-running Docker containers. Lambda functions have a maximum execution timeout of 15 minutes and are designed for short-lived, discrete invocations, not persistent microservices with continuous connections. You also cannot directly attach an Application Load Balancer to a container image in Lambda; instead, you need an API Gateway or a function URL. Thus, Lambda is not a suitable replacement for a container orchestration service like Fargate for this use case.

  When this WOULD be correct

  A company needs to run a serverless function triggered by an S3 upload event to process images, with no need for a load balancer or long-running containers. AWS Lambda would be the correct choice for this event-driven compute scenario.

• ✗

  Amazon ECS on Amazon EC2

  Why it's wrong here

  While Amazon ECS can run Docker containers, using the EC2 launch type requires you to provision and manage the underlying EC2 instances. The requirement is to avoid server management, so this option does not meet that need.

  When this WOULD be correct

  If the question required full control over the underlying EC2 instances for compliance, custom AMIs, or cost optimization through Reserved Instances, Amazon ECS on Amazon EC2 would be the correct choice.

• ✓

  AWS Fargate

  Why this is correct

  AWS Fargate is a serverless compute engine for containers that runs on top of Amazon ECS or Amazon EKS. It abstracts away all underlying EC2 instances, automatically managing host patching, capacity provisioning, and hardware failures. Fargate integrates natively with Application Load Balancers and can scale tasks or pods horizontally based on CPU/memory utilization or custom metrics. This fully meets the requirement of avoiding server management while supporting containerized microservices.

• ✗

  Amazon Lightsail

  Why it's wrong here

  Amazon Lightsail is a simplified virtual private server (VPS) service designed for straightforward workloads like blogs, simple websites, or small business apps. It does not provide native container orchestration, so there is no built-in mechanism for service discovery, rolling deployments, or automatic scaling of individual container instances. While you could manually run Docker on a Lightsail instance, you would need to configure load balancing and scaling yourself, which violates the requirement to avoid managing the underlying server infrastructure. It is architecture, not a container platform.

  When this WOULD be correct

  A small business needs a simple, predictable-cost environment to host a few Docker containers with minimal configuration, and does not require automatic scaling or ALB integration. Lightsail would be the correct choice for its ease of use and fixed pricing.

Option-by-option analysis

Why each answer is right or wrong

Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The CLF-C02 exam frequently reuses these exact scenarios with slightly different constraints.

Analysis generated from the official CLF-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”