An application uses Amazon DynamoDB to store product catalog data. During flash sales, the application experiences massive read spikes, causing ReadCapacityUnit (RCU) throttling and increased latency. The application requires microsecond read latency. What is the BEST solution?

Answer options:

Increase the provisioned RCUs.

Implement Amazon ElastiCache for Redis.

Implement Amazon DynamoDB Accelerator (DAX).

Use DynamoDB Global Tables.

How to approach this question

Look for the native DynamoDB caching solution.

Full Answer

C.Implement Amazon DynamoDB Accelerator (DAX).✓ Correct

Implement Amazon DynamoDB Accelerator (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.

Common mistakes

Choosing ElastiCache, which requires more operational overhead than DAX for DynamoDB.

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