Your company is planning to migrate code written in C# from their on-premises infrastructure onto AWS. They want to ensure to limit the amount of maintenance that would be required for the underlying infrastructure. Which of the following would they choose for hosting the code base?

Answer options:

A.AWS Lambda
B.AWS EC2
C.AWS ECS
D.AWS SQS

Answer – A
The AWS Documentation mentions the following.
AWS Lambda is a compute service that lets you run code without provisioning or managing servers. AWS Lambda executes your code only when needed and scales automatically, from a few requests per day to thousands per second. You pay only for the compute time you consume. There is no charge when your code is not running. With AWS Lambda, you can run code for virtually any type of application or backend service - all with zero administration.
With Lambda, you don`t need to build, secure, or maintain a container. You must be worried about the code.
EC2
 - is simply a remote (virtual) machine.
ECS stands for Elastic Container Service. ECS is basically a logical grouping of 
EC2
 Instances. Technically, ECS is a mere configuration for the efficient use and management of your 
EC2
 instance(s) resources i.e. storage, memory, CPU, etc.
To simplify it further, if you have launched an Amazon ECS with no 
EC2
 instances added to it, it`s good for nothing. So you can`t do anything about it. 
ECS
 makes sense only once one (or more) 
EC2
 instances are added to it.
Options B and C are incorrect since here you would need to manage the underlying servers.
Option D is incorrect since this is a messaging service.
For more information on AWS Lambda, please visit the URL-
https://docs.aws.amazon.com/lambda/latest/dg/welcome.html