What is virtual constructor paradigm?
Answers were Sorted based on User's Feedback
Answer / malini
There is no concept like Virtual Constructor and where as
Constructor cant be virtual. Constructor is a code which is
responsible for creating a instance of a class and it cant
assigned to any other object by using appending
keyword 'virtual'
| Is This Answer Correct ? | 8 Yes | 0 No |
Answer / priyanka kokil
I want to modify the above answer. A constructor cannot be
virtual because at the time when the constructor is invoked
the virtual table would not be available in the memory.
Hence we cannot have a virtual constructor. But we can have
virtual destructor which is defined in Answer #2
| Is This Answer Correct ? | 5 Yes | 0 No |
Answer / subhashish sen
Hi Priyanka Kokil,
What ever u have answered its not 100% correct..As we know
for every virtual function in a class one VTABLE is created
internally and constuctor is an entity who intializes this
VTABLE for all virtual functions of a class.For example if
we have a base class and a derived class derived from
it,then 2 VTABLE will be created one for base and one for
derived class.So if you make constructor as virtual then
who will create VTABLE for this constructor.Thats why
constructor can never be virtual.
Thanks!!!!!If u have ny suggession plz reply..
| Is This Answer Correct ? | 5 Yes | 3 No |
Answer / priyanka kokil
A virtual destructor is one that is declared as virtual in
the base class and is used to ensure that destructors are
called in the proper order. It is to be remembered that
destructors are called in the reverse order of inheritance.
If a base class pointer points to a derived class object
and we some time later use the delete operator to delete
the object, then the derived class destructor is not called.
| Is This Answer Correct ? | 2 Yes | 2 No |
Answer / priyanka kokil
Hi Subhashish Sen,
Thanks for your response and adding more details to my
answer.
Thanks
| Is This Answer Correct ? | 0 Yes | 3 No |
Write a c++ code that will calculate the roots of a quadratic equation a2+ bx+c=0 Hint: d = sqrt (b2-4ac), and the roots are: x1 = (€“b + d)/2a and x2 = (€“b €“ d)/2a (use sqrt function from cmath.h )?
Write the program for fibonacci in c++?
How many types of classes are there in c++?
How to declare a function pointer?
What are friend classes? What are advantages of using friend classes?
What is the Diffrence between a "assignment operator" and a "copy constructor"?
What's the most powerful programming language?
Explain how the virtual base class is different from the conventional base classes of the opps.
What is the difference between map and hashmap in c++?
Of the numbers 12 23 9 28 which would be at the top of a properly implemented maxheap a) 28 b) 9 c) Any of them could be
What is the word you will use when defining a function in base class to allow this function to be a polimorphic function?
Define basic type of variable used for a different condition in C++?