A gaming leaderboard application requires an in-memory data store to handle millions of requests per second with sub-millisecond latency. The data store must support complex data structures like sorted sets. Which AWS service should be used?

Answer options:

Amazon ElastiCache for Memcached

Amazon ElastiCache for Redis

Amazon DynamoDB

Amazon RDS

How to approach this question

Identify the need for an in-memory store that supports complex data structures.

Full Answer

B.Amazon ElastiCache for Redis✓ Correct

Amazon ElastiCache for Redis

Amazon ElastiCache for Redis is an in-memory data store that provides sub-millisecond latency. Unlike Memcached, Redis supports complex data structures such as lists, sets, and sorted sets, making it ideal for leaderboards.

Common mistakes

Choosing Memcached, which is simpler and only supports plain key-value strings.

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