Ultimate C Sharp Test - 79+ MCQs: C# test: Evaluate Your Skills with C# Questions and Answers

1. What is the purpose of the 'this' keyword in C#?

To create a new instance of a class

To reference the current instance of a class

To declare a constant

To define a new variable

2. What is the C# operator for multiplication?

3. What is the difference between 'sealed' and 'abstract' classes in C#?

'sealed' classes cannot be inherited, while 'abstract' classes are meant to be inherited and cannot be instantiated.

'sealed' classes are meant to be inherited and cannot be instantiated, while 'abstract' classes cannot be inherited.

'sealed' classes and 'abstract' classes are the same in C#.

There is no such thing as 'sealed' or 'abstract' classes in C#.

4. Which keyword is used to define a class in C#?

function

class

method

interface

5. What is the entry point of a C# program?

main()

start()

entry()

Main()

6. What is the primary purpose of the 'using' statement in C#?

To define a new variable

To import namespaces

To create a loop

To declare a constant

7. What is 'generics' in C#?

A way to define classes with generic parameters.

A technique for optimizing memory usage in C#.

A method for overriding base class methods.

A way to define custom attributes.

8. Which C# keyword is used to define a method in a class?

function

method

def

public

9. What is the purpose of 'interface' in C#?

To define a contract that classes must implement.

To specify the access modifiers for class members.

To define a base class for inheritance.

To define namespaces in C#.

10. What is 'LINQ' in C#?

A programming language for developing Windows applications.

A query language for querying databases in C#.

A tool for drawing user interfaces in C#.

A way to declare variables in C#.

C# MCQ Test 5