The video tutorial explains Amazon DynamoDB Accelerator (DAX), a fully managed, in-memory caching service that improves read and query performance for DynamoDB. It addresses the hotkey problem by caching frequently accessed data, reducing latency. The tutorial covers DAX cluster setup, including node provisioning and security features. It compares DAX with Amazon Elastic Cache, highlighting their complementary uses. DAX is ideal for caching individual queries, while Elastic Cache is better for storing complex application logic results. The video concludes with steps to create a DAX cluster.

What is the primary purpose of DAX in relation to DynamoDB?

How does DAX help in solving the hotkey problem?

What is the default Time-To-Live (TTL) for cached data in a DAX cluster?

What are the security features provided by DAX?

In what scenarios would you choose to use DAX over Elastic Cache?