1) What is Encapsulation and Polymorphism
2) Difference between Abstraction and Interface
3) Difference between IQueryable and IEnumerable
4) Explain Extension Methods, Anonymous method, Middleware
5) Write a C# program for reversing of the Whole String.
6) Write a C# program to print index of Array from given Array Of Numbers [2, 7, 11, 15] whose Sum is 9.
