Which service is an AWS in-memory data store service?
Amazon Aurora
Amazon RDS
Amazon DynamoDB
Amazon ElastiCache
Explanations:
Amazon Aurora is a relational database service, not an in-memory data store.
Amazon RDS is a managed relational database service but is not designed as an in-memory data store.
Amazon DynamoDB is a NoSQL database service, but it is not an in-memory data store.
Amazon ElastiCache is an AWS service designed specifically as an in-memory data store.