A DevOps engneer should be familiar with these AWS tools, but wait, what if one is not a DevOps engineer?
There are keen differences between a AWS Lambda and AWS ECS.

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_AWS Lambda *_is a _serverless *_compute service provided by Amazon Web Services (AWS) that allows developers to run code in response to events without the need to provision or manage servers. It is often referred to as "Functions as a Service" (FaaS).

AWS Elastic Container Service (ECS)** is a fully managed container orchestration service that enables developers to run, manage, and scale Docker containers on AWS.