Classes and Objects in C Sharp MCQ question and answer with solution | C# Program MCQs

struct employee
{
    private int employee id;
    private string city;
}
employee q = new employee();
employee p;
p = q;

class baseclass
{
    protected int a = 20;
}
class derived : baseclass
{
    int a = 10;
    public void math()
    {
         /* add code here */
    }   
}

interface calc
{
    void cal(int i);
}
class displayA :calc 
{
    public int x;
    public void cal(int i) 
    {
        x = i * i;            
    }
}
class displayB :calc
{
    public int x;
    public void cal(int i)
    {
        x = i / i;
    }
}
class Program
{
    public static void Main(string[] args)
    {            
        displayA arr1 = new displayA();
        displayB arr2 = new displayB();
        arr1.x = 0;
        arr2.x = 0;
        arr1.cal(2);
        arr2.cal(2);
        Console.WriteLine(arr1.x + " " + arr2.x);
        Console.ReadLine();
    }
}

class box
{
    public int volume;
    int width;
    int height;
    int length;
    public box ( int w, int h, int l)
    {
        this.width = w;
        this.height = h;
        this.length = l;
    }
    ~ box()
    {
        volume = this.width * this.length * this.height;
        console.writeline(volume);
    }
}    
class Program
{
    public  static void Main(string[] args)
    {
        box b = new box(4, 5, 9);
        Console.ReadLine();
    }
}