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

class a
{
    public  void fun()
    {
        Console.WriteLine("base method");
    }
}
class b: a
{
    public new void fun()
    {
        Console.WriteLine(" derived method ");
    }
}
class Program
{
    static void Main(string[] args)
    {
        b k = new b();
        k.fun();
        Console.ReadLine();
    }
}

class sample
{
    public  int i;
    void display() 
    {
        Console.WriteLine(i);
    }
}    
class sample1 : sample 
{
    public  int j;
    public void display() 
    {
        Console.WriteLine(j);
    }
}    
class Program
{
    static void Main(string[] args)
    {
        sample1 obj = new sample1();
        obj.i = 1;
        obj.j = 2;
        obj.display();
        Console.ReadLine();
    }
}

 class abc
 {
     public static void a()
     {
         console.writeline("first method");
     }
     public void b()
     {
         a();
         console.writeline("second method");
     }
     public void b(int i)
     {
         console.writeline(i);
         b();
     }
 }
 class program
 {
     static void main()
     {
         abc k = new abc();
         abc.a();
         k.b(20);
     }
 }

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine( vol(10));
        Console.WriteLine( vol(2.5f,  5));
        Console.WriteLine( vol( 5l,  4,  5));
        Console.ReadLine();
    }
    static int vol(int x)
    {
        return(x * x * x);
    }
    static float vol(float r,  int h)
    {
        return(3.14f * r * r * h);
    }
    static long vol(long l, int b, int h)
    {
        return(l * b * h);
    }
}

class maths
{
    public int fun(int k, int y, int n)
    {
        Console.WriteLine(k + "  " + y + "  " + n);
        return (k);
    }
    public int fun1(int t,float z)
    {
        Console.WriteLine(t + "  " + z);
        return t;
    }
}    
class Program
{
    static void Main(string[] args)
    {
        maths obj = new maths();
        int b = 90;
        int c = 100;
        int d ;
        float l;
        int i = obj.fun(b, c, 12);
        int j = (obj.fun1(12, 14.78f));
        Console.ReadLine();
    }
}

class sample
{
    public int i;
    public int[] arr = new int[10];
    public void fun(int i, int val)
    {
        arr[i] = val;
    }
}
class Program
{
    static void Main(string[] args)
    {
        sample s = new sample();
        s.i = 10;
        sample.fun(1, 5);
        s.fun(1, 5);
        Console.ReadLine();
    }
}

struct abc
{ 
    public string name;
    protected internal int age;
    private Single sal;
}

static void Main(string[] args)
{
    int X = 0;
    if (Convert.ToBoolean(X = 0))
    Console.WriteLine("It is zero");
    else 
    Console.WriteLine("It is not zero");
    Console.ReadLine();
}