php mcq questions with answers


                                


Which of the following is the correct way to define the constructor(s) of the Sample class if we are to create objects as per the C#.NET code snippet given below?



Sample s1 = new Sample(); 
Sample s2 = new Sample(9, 5.6f);




                                
A.public Sample()
{
    i = 0; 
    j = 0.0f;
}
public Sample (int ii, Single jj)
{
    i = ii;
    j = jj;
}
B.public Sample (Optional int ii = 0, Optional Single jj = 0.0f)
{
    i = ii;
    j = jj;
}
C.public Sample (int ii, Single jj)
{
    i = ii;
    j = jj;
}
D.Sample s;
E.s = new Sample();
                              
Click To Show Ans:A

                        
                                


In which of the following should the methods of a class differ if they are to be treated as overloaded methods?



    

  1. Type of arguments

    2. 

  2. Return type of methods

    3. 

  3. Number of arguments

    4. 

  4. Names of methods

    5. 

  5. Order of arguments

    6. 





                                
A.2, 4
B.3, 5
C.1, 3, 5
D.3, 4, 5
                              
Click To Show Ans:C

                        
                                


Which of the following statements are correct about constructors in C#.NET?



    

  1. Constructors cannot be overloaded.

    2. 

  2. Constructors always have the name same as the name of the class.

    3. 

  3. Constructors are never called explicitly.

    4. 

  4. Constructors never return any value.

    5. 

  5. Constructors allocate space for the object in memory.

    6. 





                                
A.1, 3, 5
B.2, 3, 4
C.3, 5
D.4, 5
E.None of these
                              
Click To Show Ans:B

                        
                                
How many times can a constructor be called during lifetime of the object?
                                
A.As many times as we call it.
B.Only once.
C.Depends upon a Project Setting made in Visual Studio.NET.
D.Any number of times before the object gets garbage collected.
E.Any number of times before the object is deleted.
                              
Click To Show Ans:B