Top "Virtual-functions" questions

In object-oriented programming, a virtual function or virtual method is a function or method whose behaviour can be overridden within an inheriting class by a function with the same signature.

Virtual table/dispatch table

From what I know of CPP, each class has its own vtable. However this wikipedia link mentions: An object's dispatch …

java c++ oop virtual-functions
Does final imply override?

As I understand it, the override keyword states that a given declaration implements a base virtual method, and the compilation …

c++ overriding final virtual-functions
Explanation on why a constructor cannot be virtual based on study : Correct the mistakes if any

I did some study to find out why a constructor cannot be virtual. I am consolidating my understanding here. I …

c++ constructor virtual-functions dynamic-binding
Template or abstract base class?

If I want to make a class adaptable, and make it possible to select different algorithms from the outside -- …

c++ design-patterns templates abstract-class virtual-functions
Accessing subclass members from a superclass pointer C++

I have an array of custom class Student objects. CourseStudent and ResearchStudent both inherit from Student, and all the instances …

c++ inheritance virtual-functions dynamic-cast static-cast
Virtual Table C++

I read a lot of people writing "a virtual table exists for a class that has a virtual function declared …

c++ derived-class virtual-functions vtable
Difference between calling of virtual function and non virtual function?

This is in fact an interview question, I can't figure out the answer. Anyone knows about this? You can talk …

c++ virtual-functions function-calls
What is the use of Java virtual method invocation?

I understand what is java method invocation and have practiced many examples using it. I want to know what is …

java oop virtual-functions
Ways to detect whether a C++ virtual function has been redefined in a derived class

In brief: From a C++ base-class pointer which points to an instance of a derived class, how can one determine …

c++ virtual-functions
Performance penalty for working with interfaces in C++?

Is there a runtime performance penalty when using interfaces (abstract base classes) in C++?

c++ performance abstract-class virtual-functions