Classes and Objects in C Sharp
practice.

Which statements among following are correct?

Which of these can be used to fully abstract a class from its implementation?

Select the class visibility modifiers among the following:

What will be the output of the following C# code?

namespace ConsoleApplication4
{   
    abstract class A 
    {
        int i;
        public  abstract void display();
    }    
    class B: A 
    {
        public  int j;
        public override void display() 
        {
            Console.WriteLine(j);
        }
    }    
    class Program
    {
        static void Main(string[] args)
        {
            B obj = new B();
            obj.j = 2;
            obj.display();
            Console.ReadLine();
        }
    }
}

What will be the output of the following C# code?

class maths
{
    static maths()
    {
        int s = 8;
        Console.WriteLine(s);
    }
    public  maths(int f)
    {
        int h = 10;
        Console.WriteLine(h);
    }
}
class Program
{
    static void Main(string[] args)
    {
        maths p = new maths(0);
        Console.ReadLine();
    }
}

What will be the output of the following C# code?

enum days:int
{
    sunday = -3,
    monday,
    tuesday
}
Console.WriteLine((int)days.sunday);
Console.WriteLine((int)days.monday);
Console.WriteLine((int)days.tuesday);

What will be the output of the following C# code?

static void Main(string[] args)
{
   int X = 6,Y = 2;
   X  *= X / Y;
   Console.WriteLine(X);
   Console.ReadLine();
}

Which of the following is the correct way of implementing an interface addition by class maths?

What does the following C# code signify?

class a
{
 
 
 
}
class b : a
{
    variable declaration;
    method declaration;
}

What will be the Correct statement in the following C# code?

interface abc
{
    String FirstName
    {
        get;
        set;
    }
   String LastName
   {
       get;
       set;
   }
   void print();
   void stock();
   int fun();
}

What will be the output of the following C# code?

interface i1
{
    void f1();
}
interface i2 :i1
{
    void f2();
}
public class maths :i2
{
    public void f2()
    {
        Console.WriteLine("fun2");
    }
    public void f1()
    {
        Console.WriteLine("fun1");
    }
}
class Program
{
    static Void Main()
    {
        maths m = new maths();
        m.f1();
        m.f2();
    }
}

What will be the output of the following C# code?

namespace ConsoleApplication4
{   
    abstract class A 
    {
        public int i;
        public abstract void display();
    }    
    class B: A 
    {
        public  int j;
        public int sum;
        public override void display() 
        {
            sum = i + j;
            Console.WriteLine(+i + "\n" + +j);
            Console.WriteLine("sum is:" +sum);
        }
    }    
    class Program
    {
        static void Main(string[] args)
        {
            A obj = new B();
            obj.i = 2;
            B obj1 = new B();
            obj1.j = 10;
            obj.display();
            Console.ReadLine();
        }
    }
}

The process of defining two or more methods within the same class that have same name but different parameters list?

What will be the output of the following C# code?

 class maths
 {
     public int length;
     public int breadth;
     public maths(int x, int y)
     {
         length = x;
         breadth = y;
         Console.WriteLine(x + y);
     }
     public maths(double x, int y)
     {
         length = (int)x;
         breadth = y;
         Console.WriteLine(x * y);
     }
 }
class Program
{
    static void Main(string[] args)
    {
        maths m = new maths(20, 40);
        maths k = new maths(12.0, 12);
        Console.ReadLine();
    }
}

What will be the output of the following C# code?

static void Main(string[] args)
{
    int x = 4 ,b = 2;
    x -= b/= x * b;
    Console.WriteLine(x + " " + b);
    Console.ReadLine();
}

Which of these keywords is used to refer to member of base class from a sub class?

Which of the following functionality is facilitated by inheritance mechanism?

What is the process of defining a method in terms of itself, that is a method that calls itself?

Which keyword is used to declare a base class method while performing overriding of base class methods?

What will be the output of the following C# code?

class z
{
    public string name1;
    public string address;
    public void show()
    {
        Console.WriteLine("{0} is in city{1}", name1, " ", address);
    }
}
class Program
{
    static void Main(string[] args)
    {
        z n = new z();
        n.name1 = "harsh";
        n.address = "new delhi";
        n.show();
        Console.ReadLine();
    }
}