A company is building a real-time leaderboard for a mobile game. The leaderboard requires sorting complex datasets, high availability, and the ability to persist data to disk in case of a node failure.<br/><br/>Which TWO statements about the appropriate caching solution are correct? (Select TWO.)

Answer options:

The company should use Amazon ElastiCache for Memcached.

The company should use Amazon ElastiCache for Redis.

Memcached supports complex data structures like sorted sets.

Redis supports complex data structures like sorted sets.

Memcached provides native multi-AZ failover.

How to approach this question

Differentiate between Redis and Memcached capabilities.

Full Answer

Amazon ElastiCache for Redis is the best choice for leaderboards because Redis natively supports complex data structures like Sorted Sets. Redis also supports data persistence, replication, and Multi-AZ high availability, unlike Memcached.

Common mistakes

Choosing Memcached for complex data types or high availability.

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