AWS Certified Cloud Practitioner — Question 637

Which AWS service is an in-memory data store service?

Answer options

• A. Amazon Aurora
• B. Amazon RDS
• C. Amazon DynamoDB
• D. Amazon ElastiCache

Correct answer: D

Explanation

Amazon ElastiCache is a fully managed, in-memory data store and caching service that supports Redis and Memcached to deliver sub-millisecond response times. In contrast, Amazon RDS and Amazon Aurora are relational database services, and Amazon DynamoDB is a NoSQL database service, all of which primarily persist data to disk rather than operating in-memory.