C# Programming Mock Test 5

10%

Question 1 of 10

1. Which statements are correct about operator overloading?

All of the mentioned

Graphical programs where coordinate related objects are used to represent positions on the screen

Mathematical or physical modeling where we use classes to represent objects such as vectors, matrices, complex-numbers etc

Financial programs where a class represents an amount of money

Question 1 of 10

Question 2 of 10

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

 class maths
 {
     public maths()
     {
         Console.WriteLine("constructor 1 :");
     }
     public maths(int x)
     {
         int p = 2;
         int u;
         u = p + x;
         Console.WriteLine("constructor 2: " +u);
     }
 }
 class Program
 {
     static void Main(string[] args)
     {
         maths k = new maths(4);
         maths t = new maths();
         Console.ReadLine();
     }
 }

constructor 2: 6
constructor 1:

constructor 1:
constructor 2: 6

constructor 2: 6
constructor 2: 6

none of the mentioned

Question 2 of 10

Question 3 of 10

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

 class maths
 {
     public int fun(int ii)
     {
         return(ii > 0 ? ii :ii * -1);
     }
     public long fun(long ll)
     {
         return(ll > 0 ? ll :ll * -1);
     }
     public double fun( double dd)
     {
         return(dd > 0 ? dd :dd * -1);
     }
 }    
 class Program
 {
     static void Main(string[] args)
     {
         maths obj = new maths();
         int i = -25;
         int j ;
         long l = -100000l ;
         long m;
         double d = -12.34;
         double e;
         j = obj.fun(i);
         m = obj.fun(l);
         e = obj.fun(d);
         Console.WriteLine(j + "  " + m + "  " + e);
         Console.ReadLine();
     }
 }

0 0 0

25 100000 12.34

-25 -100000 -12.34

1 1 1

Question 3 of 10

Question 4 of 10

4. 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();
     }
 }

   method 1:
   20
   method 1:
   method 2:

   method 1:
   method 2:
   20
   method 1:

   method 2:
   20
   method 1:
   method 1:

   method 1:
   0
   method 2:
   method 2:

Question 4 of 10

Question 5 of 10

5. 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();
    }
}

60, 24

60, 144.0

60, 0

60, 144

Question 5 of 10

Question 6 of 10

6. What will be the correct way to implement the interface in the following C# code?

  interface abc
   {
       string name
       {
           get;
           set;
       }
   }

 
   class emp :employee
   {
       private string str;
       public string firstname;
       {
           get
           {
               return str;
           }
           set
           {
               str = value;
           }
       }
   }

 
 class emp: implements person
 {
     private string str;
     public string person.firstname
     {
         get
         {
             return str;
         }
         set
         {
             str = value;
         }
     }
 }

 
  class emp :implements person
  {
      private string str;
      public string firstname
      {
          get
          {
              return str;
          }
          set
          {
              str = value;
          }
      }
  }

None of the mentioned

Question 6 of 10

Question 7 of 10

7. The modifier used to define a class which does not have objects of its own but acts as a base class for its subclass is?

New

Static

Abstract

Sealed

Question 7 of 10

Question 8 of 10

8. 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();
    }
}

Compile time error

B, B

A, A

A, B

Question 8 of 10

Question 9 of 10

9. Which keyword is used to refer baseclass constructor to subclass constructor?

Static

Base

This

Extend

Question 9 of 10

Question 10 of 10

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

 class baseclass
 {
     int a;
     public baseclass(int a1) 
     {
         a = a1;
         console.writeline(" a ");
     }
     class derivedclass : baseclass
     {
         public derivedclass (int a1) : base(a1)
         {
             console.writeline(" b ");
         }
     }
     class program
     {
         static void main(string[] args)
         {
             derivedclass d =  new derivedclass(20);
         }
     }
 }

b
a

Compile time error

a
b

The program will work correctly if we replace base(a1) with base.baseclass(a1)

Question 10 of 10

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