What is the name of AWS's Function as a Service?

The name of AWS's Function as a Service is indeed Amazon Lambda. This service allows users to run code in response to events without needing to provision or manage servers. Developers can create applications that respond to various events, such as changes in data within an S3 bucket or an API request through AWS API Gateway, and they only pay for the compute time they consume.

Lambda is notable for its serverless architecture, meaning that users do not have to worry about the underlying infrastructure. Instead, they can focus solely on their code. This service supports multiple programming languages, making it versatile for different use cases and enabling developers to build scalable applications efficiently.

Other options, while they sound related to cloud functions, do not correctly refer to AWS's Function as a Service. For instance, "Amazon Cloud Functions" and "Amazon Functions" do not exist as official AWS services, and "Amazon Serverless" is a general term that could refer to multiple services or methodologies within AWS rather than something specific like Lambda.