Amazon EMR is not Serverless, both are different and used for different purposes. Amazon EMR is a tool for processing Big Data whereas Serverless focuses on creating applications without the need for servers or building serverless.
Serverless the main feature is the API integration and Amazon EMR is on-demand compute power. Want to get certified in AWS Big Data? Then check out the AWS Big Data certification course from Intellipaat which provides you with 32hrs of online training course along with 40hrs of projects and exercises.
Also, do check out our YouTube video on Introduction to Amazon Elastic MapReduce to get an insight.