What is a frame work (need small introduction )

Answer 1

I don't think framework has a widely accepted definition yet, but here goes:
Roughly speaking, a framework is a development approach (the technology kind, not the how-to-milk-the-most-out-of-your-team kind). Often this includes libraries (collections of reusable code). One way of thinking about it is libraries are a buffet and frameworks are the eating strategy or plan of attack. Another way to think about it is a framework guides the developer while the developer picks what parts of libraries they want to use.
But again, the definition of framework is still a topic of debate it seems.