Your company is planning on moving its on-premise data to AWS. They have some Node.js code that needs to be ported onto AWS with the least amount of administrative headache. You also need to ensure that cost is minimized for hosting the code base. Which of the following service would you use for this purpose?

Answer options:

A.AWS API gateway
B.AWS Lambda
C.AWS EC2
D.AWS SQS

Answer – B
This is mentioned in the AWS Documentation.
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. AWS Lambda runs your code on a high-availability compute infrastructure and performs all of the compute resources administration, including server and operating system maintenance, capacity provisioning and automatic scaling, code monitoring and logging. All you need to do is supply your code in one of the languages that AWS Lambda supports (currently Node.js, Java, C#, Go and Python).
Option A is incorrect since this is used to manage API.
Option C is incorrect since this would incur a higher cost for hosting.
Option D is incorrect since this is a messaging service.
For more information on AWS Lambda, please refer to the below URL-
https://docs.aws.amazon.com/lambda/latest/dg/welcome.html