C# Interview Questions and Answers

Last Updated: Aug 31, 2013

Aug 31 • Placement • 31820 Views • 28 Comments on C# Interview Questions and Answers

C# is an elegant and type-safe object-oriented language that enables developers to build a variety of secure and robust applications that run on the .NET Framework. C# can be used to create traditional Windows client applications, distributed components, different applications and many more. C# became the most vital subjects or programming language for freshers. Their are lots of opportunity in C#. We have provided the important C# interview questions and answers asked during several interview and we have also attached the pdf . 

C#

Interview Questions on C#

1. What is C# ?

C# (pronounced “C sharp”) is a simple, modern, object-oriented, and type-safe programming language used with XML-based Web services on the .NET platform and designed for improving productivity in the development of Web applications. It will immediately be familiar to C and C++ programmers.

2. What are the types of comment in C#?

There are 3 different types of comments in C#.

        • 1. Single Line Comment : The single line comment is specified using the symbol “//”
          Eg: // this is a AbundantCode comment
        • 2. Multi Line Comment :The Multiline comment can be specified using the symbol “/* */”
          Eg: /* This is a test comment */
        • 3. XML Comment:This is a special kind of comment which is generally used for API documentation. The symbol /// is used to specify the XML comment in C#

3. What are the namespaces used in C#.NET?

Namespace is a logical grouping of class.
using System;
using System.Collections.Generic;
using System.Windows.Forms;

4. What are the characteristics of C#?

Characteristics of C# :

        • Consistent
        • Modern
        • Object Oriented
        • Type Safe
        • Versionable
        • Flexible

5. What are the different categories of inheritance?

In C# inheritance may be implemented in four categories :

    • Single Inheritance
    • Multilevel Inheritance
    • Multiple Inheritance
    • Hierarchical Inheritance

6. What are the basic concepts of object oriented programming?

The concepts used extensively in object oriented programming are :

  • Objects
  • Classes
  • Data abstraction and encapsulation
  • Inheritance
  • Polymorphism
  • Dynamic Binding
  • Message passing.

7. Can you inherit multiple interfaces?

Yes. Multiple interfaces may be inherited in C#.

8. What is a base class?

A base class is a class that is used to create, or derive other classes. Classes derived from a base class are called child classes, subclasses or derived classes. A base class does not inherit from any other class and is considered parent of a derived class.

9. What are the different types of statements supported in C#?

C# supports several different kinds of statements are

  • Block statements
  • Declaration statements
  • Expression statements
  • Selection statements
  • Iteration statements
  • Jump statements
  • Try catch statements
  • Checked and unchecked

10. What are the different types of Caching?

There are three types of Caching :

  • Output Caching
  • Fragment Caching
  • Data Caching

Related Links : 

1. C Interview Questions
2. C++ Interview Questions

 Download   Interview Questions and Answers on C#.pdf

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