AWS Certified Developer Associate Practice Test 2

Correct answer - "DynamoDB DAX" : Amazon DynamoDB Accelerator (DAX) is a fully managed, highly available, in-memory cache for DynamoDB that delivers up to a 10x performance improvement : from milliseconds to microseconds : even at millions of requests per second.

"DynamoDB Streams" - A stream record contains information about a data modification to a single item in a DynamoDB table. Not what you are looking for

"ElastiCache" - ElastiCache can cache the results from anything but you will need to adjust your code to check the cache before querying the main query store

"More partitions" - DynamoDB handles that for you automatically

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