Final answer:
Amazon S3, Amazon RDS, and Amazon Lambda (AWS Lambda) are AWS-Managed Services where AWS handles the operational and maintenance burdens. Amazon EC2 is not a fully managed service as users manage their own virtual servers.
Step-by-step explanation:
The AWS-Managed Services are those in which AWS is responsible for the operational and maintenance aspects. Of the options provided:
- Amazon EC2: This is a service where the user is responsible for managing the virtual servers, including the operating system and applications. Therefore, it is not a fully AWS-managed service.
- Amazon S3: As a storage service, AWS manages the infrastructure, making S3 an AWS-managed service.
- Amazon RDS: This managed database service handles much of the maintenance work such as backups, patching, and scaling, categorizing it as an AWS-managed service.
- Amazon Lambda (correct name is AWS Lambda): As a serverless computing platform, AWS fully manages the infrastructure, making Lambda an AWS-managed service.