Classes and Objects in C Sharp
practice.

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

int a+= (float) b/= (long)c.

Which of the following statements is correct?

Which statements are correct?

How many values does a function return?

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

namespace ConsoleApplication4
{
    public abstract class A
    {
        public int i = 7;
        public abstract void display();
    }    
    class B: A 
    {
        public int j;
        public override void display() 
        {
            Console.WriteLine(i);
            Console.WriteLine(j);
        }
    }    
    class Program
    {
        static void Main(string[] args)
        {
            B obj = new B();
            A obj1 = new B();
            obj.j = 1;
            obj1.i = 8;
            obj.display();
            Console.ReadLine();
        }
    }
}

What does the following C# code imply?

csharp abc;
abc = new charp();

Choose the correct statements about enum used in C#.NET?

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

 class A 
 {
     public virtual void display() 
     {
         Console.WriteLine("A");
     }    
 }    
 class B: A 
 {
    public override void display() 
    {
        Console.WriteLine(" B ");
    } 
 }    
class Program
{
    static void Main(string[] args)
    {
        A obj1 = new A();
        B obj2 = new B();
        A r;
        r = obj1;
        r.display();
        r = obj2;
        r.display();     
        Console.ReadLine();
    }
}

Which is the correct way to create an object of the given class abc?

Which of these is not a correct statement?

Name a method which has the same name as that of class and which is used to destroy objects also called automatically when application is finally on process of being getting terminated.

Which statements are correct about operator overloading?

Choose the wrong statement from the given set of statements?

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

interface calc
{
    void cal(int i);
}
public  class maths :calc 
{
    public int x;
    public void cal(int i) 
    {
        x = i * i;            
    }
}
class Program
{
    public static void Main(string[] args)
    {            
        display arr = new display();
        arr.x = 0;      
        arr.cal(2);
        Console.WriteLine(arr.x);
        Console.ReadLine();
    }
}

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

enum color:int
{
    red,
    green,
    blue = 5,
    cyan,
    pink = 10,
    brown
}
console.writeline((int)color.green);
console.writeline((int)color.brown);

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

class maths
{
    int i;
    public  maths(int ii)
    {
        ii = -25;
        int g;
        g = ii > 0 ? ii : ii * -1;
        Console.WriteLine(g);
    }
}
class maths1 :maths
{
    public  maths1(int ll) :base(ll)
    {
        ll = -1000;
        Console.WriteLine((ll > 0 ? ll : ll * -1));
    }
}
class Program
{
    static void Main(string[] args)
    {
        maths1 p = new maths1(6);
        Console.ReadLine();
    }
}

Operators that can be overloaded are?

Which of the following cannot be used to declare a class as a virtual?

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

class maths
{
    public static void fun1()
    {
        Console.WriteLine("method 1 :");
    }
    public void fun2()
    {
        fun1();
        Console.WriteLine("method 2 :");
    }
    public void fun2(int k)
    {
        Console.WriteLine(k);
        fun2();
    }
}    
class Program
{
    static void Main(string[] args)
    {
        maths obj = new maths();
        maths.fun1();
        obj.fun2(20);
        Console.ReadLine();
    }
}

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

static void Main(string[] args)
{
    int a = 10 , b = 20;
    Console.WriteLine("Result before swap is: "+ a +" "+b);
    swap(ref a, ref b);
    Console.ReadLine();
}
static void swap(ref int i, ref int j)
{
    int t;
    t = i;
    i = j;
    j = t;
    Console.WriteLine("Result after swap is:"+ i +" "+j);
}