C# Interview Questions

C# Interview Questions
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C# is a popular programming language used to develop a wide range of applications, including desktop applications, web applications, and mobile applications. If you're preparing for a job interview that requires knowledge of C#, it's essential to be prepared for the types of questions you may be asked. In this article, we'll cover some of the top C# interview questions to help you prepare for your next interview.

What is C#?

This is a fundamental question that you should be prepared to answer. C# is a modern, object-oriented programming language developed by Microsoft. It was designed to be simple, yet powerful, and is commonly used to develop Windows desktop applications, web applications, and games.

What is the difference between C# and C++?

C# and C++ are both object-oriented programming languages, but there are some key differences between the two. One of the main differences is that C# is managed code, while C++ is unmanaged code. This means that C# programs are executed by the .NET framework, while C++ programs are executed directly by the operating system.

What is the difference between a class and an object?

A class is a blueprint for creating objects, while an object is an instance of a class. In other words, a class is like a template, while an object is the actual item created from that template.

What is a constructor in C#?

A constructor is a special method that is used to initialize objects when they are created. Constructors have the same name as the class and can take parameters to set the initial values of an object's properties.

What is the difference between a value type and a reference type in C#?

In C#, variables can be either value types or reference types. Value types are variables that store their data directly in memory, while reference types store a reference to an object in memory. Examples of value types include int, float, and bool, while examples of reference types include classes and arrays.

What is inheritance in C#?

Inheritance is a key feature of object-oriented programming that allows you to define a new class based on an existing class. The new class inherits all the properties and methods of the existing class, and can also add its own unique properties and methods.

What is a delegate in C#?

A delegate is a type that represents a reference to a method. Delegates are often used to define callback methods, where one method calls another method that is defined elsewhere.

What is the difference between a struct and a class in C#?

In C#, structs and classes are both used to define custom data types, but there are some key differences between the two. Structs are value types, while classes are reference types. Structs are often used for small, simple data types, while classes are used for more complex data types.

What is a generic in C#?

A generic is a type that is defined with one or more type parameters. This allows you to create a single class or method that can work with different types of data, without having to create separate versions for each type.

What is LINQ in C#?

LINQ (Language Integrated Query) is a set of features that allow you to query data in a more natural and intuitive way. LINQ includes a set of standard query operators, which can be used with any collection of data that implements the IEnumerable interface.


These are just some of the top C# interview questions that you may be asked during a job interview. By preparing for these questions, you can demonstrate your knowledge and expertise in C#, and increase your chances of landing your dream job. Remember to practice your answers and be confident during the interview. Good luck!

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