Which AWS service is serverless?Question 21Answera.Amazon EMRb.AWS Lambdac.Amazon EC2d.AWS Elastic Beanstalk

The serverless service in AWS is AWS Lambda.

Here's a step-by-step explanation:

1. Amazon EMR (Elastic MapReduce) is a cloud-native big data platform, allowing processing vast amounts of data quickly, and cost-effectively at scale using popular distributed frameworks such as Hadoop, Spark, HBase, Presto, and Flink. However, it is not serverless as it requires server provisioning.

2. AWS Lambda is a serverless compute service that lets you run your code without provisioning or managing servers. It executes your code only when needed and scales automatically, from a few requests per day to thousands per second. Hence, AWS Lambda is the serverless service.

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