by Jeff Franz
Dive into the world of C# programming with this engaging quiz designed to test your knowledge and skills. From basic syntax to advanced concepts, each question is crafted to challenge your understanding and help you gauge your proficiency. Good luck, and may your code be bug-free!
We recommend that you do not leave the page that you are taking this quiz in. Stay honest 🙂
C# Quiz Questions Overview
1. What is the correct syntax to declare a variable in C#?
int number = 5;
int number := 5;
int number <- 5;
int number << 5;
2. Which of the following is a reference type in C#?
int
double
string
bool
3. What is the default value of a boolean variable in C#?
true
false
null
0
4. Which keyword is used to handle exceptions in C#?
try
catch
finally
All of the above
5. What is the output of the following code: Console.WriteLine(5 + “5”);?
10
55
5
Error
6. Which of the following is NOT a valid access modifier in C#?
public
private
protected
internal protected
7. Which method is used to start a thread in C#?
Start()
Run()
Begin()
Execute()
8. What is the purpose of the ‘using’ statement in C#?
To include namespaces
To manage resources
To declare variables
To handle exceptions
9. Which of the following is a value type in C#?
string
object
int
array
10. What does the ‘static’ keyword mean in C#?
The member belongs to the type itself rather than to a specific object.
The member can be accessed only within its own class.
The member cannot be modified.
The member is a constant.
11. Which of the following is a correct way to declare a delegate in C#?
delegate void MyDelegate();
void delegate MyDelegate();
delegate MyDelegate void();
void MyDelegate delegate();
12. What is the output of the following code: Console.WriteLine(10 / 3);?
3.3333
3
3.0
Error
13. Which of the following is a valid way to initialize an array in C#?
int[] numbers = new int[5];
int numbers = new int[5];
int[] numbers = int[5];
int numbers = int[5];
14. Which of the following is a correct way to implement an interface in C#?
class MyClass : IMyInterface {}
class MyClass implements IMyInterface {}
class MyClass inherits IMyInterface {}
class MyClass extends IMyInterface {}
15. What is the purpose of the ‘override’ keyword in C#?
To provide a new implementation of a virtual method in a derived class.
To declare a method as virtual.
To prevent a method from being overridden.
To hide a method in the base class.
16. Which of the following statements is true about the ‘abstract’ keyword in C#?
An abstract class cannot be instantiated.
An abstract class must have at least one abstract method.
An abstract method must be implemented in the base class.
An abstract class cannot have non-abstract methods.
17. What is the purpose of the ‘sealed’ keyword in C#?
To prevent a class from being inherited.
To declare a class as abstract.
To make a method virtual.
To hide a method in the base class.
18. Which of the following is a correct way to create a new object in C#?
MyClass obj = new MyClass();
MyClass obj = MyClass();
MyClass obj = create MyClass();
MyClass obj = MyClass.new();
19. What is the output of the following code: Console.WriteLine(“Hello” + ” ” + “World”);?
HelloWorld
Hello World
Hello
World
20. Which of the following is a correct way to declare a constant in C#?
const int number = 10;
int const number = 10;
constant int number = 10;
int number const = 10;
We recommend that you do not leave the page that you are taking this quiz in. Stay honest 🙂
