A user is planning to use the AWS RDS with MySQL. Which of the below mentioned services the user is not going to
pay?

A.
Data transfer

B.
RDS Cloudwatch metrics

C.
Data storage

D.
I/O requests per month

Explanation:
RDS charges the user on a pay as you go basis. It charges the user based on the instance type, number of hours that
the instance is running, data transfer, storage cost as well for the I/O requests. The monitoring is free of cost.
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Welcome.html