AWS Certified Developer Associate DVA-C02 Practice Question

Amazon DynamoDB Accelerator (DAX) is the most effective solution because it is a fully managed, in-memory cache specifically designed and optimized for DynamoDB. It transparently handles caching of frequently accessed items, reducing read latency from milliseconds to microseconds and offloading read traffic from the underlying table to mitigate throttling. While increasing the table's Read Capacity Units (RCUs) would address throttling, it is often less cost-effective and does not provide the same latency improvement for hot items as an in-memory cache. An ElastiCache cluster with a write-through strategy is suboptimal because the workload is read-heavy, not write-heavy. Using Amazon S3 is inappropriate for this use case, as it is an object storage service not designed for low-latency database caching.