What is extension method in C# Interview Questions?
Extension methods enable you to add methods to existing types without creating a new derived type, recompiling, or otherwise modifying the original type. An extension method is a special kind of static method, but they are called as if they were instance methods on the extended type.
What is abstraction in C# Interview Questions?
A method that does not have the body is called an abstract method. It is declared with the modifier abstract. It contains only the Declaration/signature and does not contain the implementation/ body of the method. An abstract function should be terminated with a semicolon.
How is C# different from C?
C# is a object-oriented programming language, is pronounced as C-Sharp. This language was developed to compete with Java, by Microsoft under the leadership of Anders Heijlberg and his team….Difference between C and C#
| S.NO | C | C# |
|---|---|---|
| 4. | C language can be executed cross-platform. | Whereas .NET Framework is required to execute C# language. |
Why multiple inheritance in C# is not possible?
C# compiler is designed not to support multiple inheritence because it causes ambiguity of methods from different base class. This is Cause by diamond Shape problems of two classes If two classes B and C inherit from A, and class D inherits from both B and C.
Why do we use interfaces in C#?
Why And When To Use Interfaces? 1) To achieve security – hide certain details and only show the important details of an object (interface). 2) C# does not support “multiple inheritance” (a class can only inherit from one base class).
Can we inherit static class in C#?
Static classes are sealed and therefore cannot be inherited. They cannot inherit from any class except Object. Static classes cannot contain an instance constructor. However, they can contain a static constructor.
What is difference between encapsulation and abstraction in C#?
Encapsulation is data hiding(information hiding) while Abstraction is detail hiding(implementation hiding). While encapsulation groups together data and methods that act upon the data, data abstraction deal with exposing to the user and hiding the details of implementation.
Why C# is called C sharp?
The name “C sharp” was inspired by the musical notation whereby a sharp symbol indicates that the written note should be made a semitone higher in pitch.
How is Diamond problem solved in C#?
The diamond problem is resolved by the most specific override rule in C# 8. In most specific override rules the class implementation of an interface member always wins.