AWS Certified Developer Associate DVA-C02 Practice Question

Amazon DynamoDB Accelerator (DAX) is a fully managed, in-memory cache that is API-compatible with DynamoDB. Because it sits transparently between the application and DynamoDB, the developer can redirect existing SDK calls to the DAX endpoint with minimal code changes. DAX automatically handles read-through and write-through caching, absorbs bursty read traffic, and can reduce response times from milliseconds to microseconds, preventing throttling of the underlying table. ElastiCache is a general-purpose in-memory store, but it requires additional application logic for cache population and invalidation. RDS Read Replicas, AWS DataSync, and Amazon S3 Transfer Acceleration do not provide a managed cache for DynamoDB reads.