Exam AWS Certified Cloud Practitioner topic 1 question 562 discussion

B. Amazon ElastiCache Amazon ElastiCache is a web service that makes it easy to deploy, operate, and scale an in-memory data store or cache in the cloud. ElastiCache supports two open-source in-memory caching engines: Memcached and Redis. ElastiCache is fully managed and can be easily integrated with other AWS services, such as Amazon RDS, DynamoDB, and Redshift. It provides a cost-effective, high-performance, and fully managed solution that allows customers to quickly and easily add caching to their applications, improving their performance and responsiveness. Amazon DynamoDB is a fully managed NoSQL database service that supports document and key-value data structures. Amazon Elastic Block Store (EBS) is a block storage service for Amazon Elastic Compute Cloud (EC2) instances. Amazon Redshift is a fully managed data warehouse service that enables customers to analyze large amounts of data using SQL and BI tools.

B. Amazon ElastiCache "Amazon ElastiCache for Redis is designed to be protocol-compliant with open source Redis. Code, applications, drivers and tools a customer uses today with their existing standalone Redis data store will continue to work with Amazon ElastiCache for Redis and no code changes will be required for existing Redis deployments migrating to Amazon ElastiCache for Redis unless noted. " https://aws.amazon.com/elasticache/faqs/#:~:text=Amazon%20ElastiCache%20for%20Redis%20is%20designed,Amazon%20ElastiCache%20for%20Redis%20unless%20noted.

B is the answer.