An application requires a database that can handle millions of requests per second with microsecond latency. The data model is a simple key-value store. Which AWS database service is MOST appropriate?

Answer options:

Amazon RDS for PostgreSQL

Amazon DynamoDB with DAX

Amazon Redshift

Amazon Neptune

How to approach this question

Match 'microsecond latency' and 'key-value' to the database and cache.

Full Answer

B.Amazon DynamoDB with DAX✓ Correct

Amazon DynamoDB with DAX

Amazon DynamoDB is a highly scalable key-value store. DynamoDB Accelerator (DAX) is an in-memory cache specifically designed for DynamoDB that delivers up to a 10x performance improvement, from milliseconds to microseconds.

Common mistakes

Choosing standard DynamoDB, which provides millisecond (not microsecond) latency.

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