For telephonic interview asked:- OOPs Concept Overloading and Overriding Sealed class and Static class Abstact and Interfase UserControl and Custom Control Client Side Validation and Server side Validation Form/Window/User Authentication ViewState and Hiddenfield Deligates and Use of that Design Pattern State Management Technique(Cashing) Garbage Collection and Its Work Mvc Life CycleTrigger Join Primary Key and Unique Key and Candidate Key