An application team wishes to use Amazon ElastiCache to improve their application performance. The application has a requirement that the data must always be the most recent. Which caching strategy should the team employ?

Answer options:

A.Write-Through
B.Lazy Loading
C.Cache-Aside
D.Read-Through

Answer: A
Option A is CORRECT because Write-Through caching strategy updates the cache with every write operation, thus ensuring that the cache always contains the most recent data.
Option B is incorrect because lazy loading caching strategies update data in cache only when a cache miss occurs. This means that the cache can contain stale data that is out of date with the data stored in the source database.
Option C is incorrect because the Cache-Aside caching pattern is a form of lazy loading caching strategy.
Option D is incorrect because the Read-Through caching pattern is a form of lazy loading caching strategy.
Reference:
https://docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/Strategies.html