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In C++, method overriding allows us to redefine a function from a parent class (base class) in its child class (derived class) to modify its ...read more

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Last Updated: 18 January 2023

Virtual function: Virtual function is a member function which is declared within a base class and is redefined by a derived class.Inline fun ...read more

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`util.promisify()` in Node.js converts callback-based methods to promise-based, aiding in managing asynchronous code more cleanly. This alle...read more

Runtime Polymorphism in various types of Inheritance in C++

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C++ allows users to use the concept of Run-Time Polymorphism using Virtual Functions for any type of Inheritance . Below is how to implement ...read more

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Virtual Function in C++ A virtual function is a member function which is declared within a base class and is re-defined(Overridden) by a der ...read more

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C++ | Virtual Functions | Question 14

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Technical Scripter 2019

Last Updated: 28 June 2021

Predict the output of following C++ program[sourcecode language="C"]#includeiostreamusing namespace std;class Base{public: virtual void s ...read more

C++ | Virtual Functions | Question 13

Last Updated: 28 June 2021

[sourcecode language="C"]#include iostreamusing namespace std; class A{public: virtual void fun() { cout A::fun() ; }}; class B: public ...read more

C++ | Virtual Functions | Question 12

Last Updated: 28 June 2021

Predict the output of following C++ program. Assume that there is no alignment and a typical implementation of virtual functions is done by ...read more

C++ | Virtual Functions | Question 5

Last Updated: 28 June 2021

[sourcecode language="C"]#includeiostreamusing namespace std;class Base{public: virtual void show() = 0;};int main(void){ Base b; B ...read more

C++ | Virtual Functions | Question 4

Last Updated: 10 July 2021

Which of the following is true about pure virtual functions?1) Their implementation is not provided in a class where they are declared.2) If ...read more

C++ | Virtual Functions | Question 3

Last Updated: 28 June 2021

Output of following program[sourcecode language="C"]#includeiostreamusing namespace std;class Base{public: virtual void show() { cout In ...read more

C++ | Virtual Functions | Question 2

Last Updated: 28 June 2021

Predict output of the following program[sourcecode language="C"]#includeiostreamusing namespace std;class Base{public: virtual void show( ...read more

C++ | Virtual Functions | Question 1

Last Updated: 28 June 2021

Which of the following is true about virtual functions in C++.(A) Virtual functions are functions that can be overridden in derived class wi ...read more