How Vtable of Virtual functions work

Question

I have a small doubt in Virtual Table, whenever compiler encounters the virtual functions in a class, it creates Vtable and places virtual functions address over there. It h

Answer 1

For each class with virtual functions, a vtable is created. Then, when an object of a class with a viable is created using a constructor, the constructor copies the appropriate vtable into the object. So each object has a pointer to its vtable ( or in the case of multiple inheritance, when necessary, a Orr to each of its vtables. ). The compiler knows where in the object the vtable is, so when it needs to call a virtual method, it outputs byte code to deterrence the vtable, lookup the appropriate method, and jump to its address.

In the simple case of single inheritance, a child class starts with a copy of the parent class's vtable and then gets an overridden entry for each virtual method in the child class that overrides a parent class's method. ( and it also gets a new entry for every virtual function in the child clad that does not override a parent class method )