Answer:   Caching means storing data temporarily in the memory so that the application can access the data from the cache instead of looking for its original location. This increases the performance of the application and its speed. System.Runtime.Caching namespace is used for Caching information in .Net.
Given below are the 3 different types of Caching:
• Page Caching
• Data Caching
• Fragment Caching

Answer:   Caching is a technique that allows to store/cache page output or application data on the client. The cached information is used to serve subsequent requests that avoid the overhead of recreating the same information.