C# Inheritance Quiz

In C#, which keyword is used to define a class that inherits from another class?

• A. base

• B. extend

• C. inherit

• D. : (colon)

What is the term for a class that cannot be instantiated and is only meant to be inherited from in C#?

• A. Final class

• B. Base class

• C. Abstract class

• D. Sealed class

Which keyword in C# is used to prevent a class from being inherited by other classes?

• A. abstract

• B. static

• C. sealed

• D. override

What will be the output of the following code?

class Country

{

    public virtual void country()

    {

        Console.WriteLine("India");

    }

}

class India : Country

{

    public new void country()

    {

        Console.WriteLine("Best");

    }

}

Country india=new Country();

Country India=new India();

India country=new india();

india.country();

India.country();

country.country();

• A. "India"

  "India"

  "Best"

• B. "India"

  "Best"

  "Best"

• C. "Best"

  "India"

  "Best"

• D. Compilation Error

Suppose you have a base class Shape and two derived classes Circle and Rectangle. How would you implement method overriding in C# to calculate the area for each shape?

• A. Use the base keyword in the derived class methods.

• B. Use the new keyword in the derived class methods.

• C. Use the virtual keyword in the base class and override keyword in the derived classes.

• D. Use the override keyword in the base class and virtual keyword in the derived classes.