Fragment caching refers to the caching of individual user controls within a Web Form. Each user control can have independent cache durations and implementations of how the caching behavior is to be applied. Fragment caching is useful when you need to cache only a subset of a page.
In ASP.NET, fragment caching is a technique used to cache portions of a web page rather than caching the entire page. This allows specific parts of the page, such as user controls or custom controls, to be cached independently, thus improving performance by reducing the processing overhead associated with generating those portions of the page repeatedly.
The correct answer to the question “What is fragment caching?” could be:
“Fragment caching in ASP.NET is a mechanism to cache specific sections or fragments of a web page rather than caching the entire page. This technique helps improve performance by storing the output generated by these fragments, such as user controls or custom controls, in memory or on disk. Subsequent requests for the same fragment can then be served directly from the cache without re-executing the code to generate it, thus reducing processing overhead and improving overall page load times.”