Caching is a widely used technique to enhance system performance. In essence, frequently accessed content is stored in a faster temporary storage, called a Cache. This allows the content to be retrieved directly from the cache, rather than fetching it from the actual source every time. Retrieving content from the cache improves performance, as it is faster than retrieving it from the actual source. The actual data source can be a service, database, or any other system. Although the following illustrations take a database as the data source, the same concept applies to other systems. Accessing a database can be an expensive operation. Frequent access to the same data can have performance implications on both the application and the database. Caching can reduce response time for the application and decrease the load on the underlying database. There are different strategies for selecting the right kind of cache. The choice of these strategies depends on how the data is used, like how it...