Capgemini .NET Developer interview questions

Tell me about yourself. C#: How much do you rate yourself in each technology. Multi-threading in C#. What is Abstract class? Is it possible to create an instance of an abstract class? What is abstract method? What is different between abstract class and an interface? Why multilevel inheritance is not supported in C#? How to override method in derived class? What is runtime polymorphism? Method Overloading and method Overriding. What is generic class? What are delegates? How to synchronize two threads? MVC: What is authentication and explain token based authentication? What is authorization? What are filters in MVC?