Friend Classes and Functions in C++

Which keyword is used to declare a friend class in C++?

What is the purpose of a friend function in C++?

Which type of function can be declared as a friend function in C++?

What is the main advantage of using friend classes in C++?

In the given example, which class is allowed to access the private members of Node?

Which keyword is used to declare a friend class in C++?

What is the purpose of a friend function in C++?

Can a friend function be a member function of another class?

What is an example of a friend class in C++?

What is the scope of a friend function in C++?

Which of the following is true about friend classes in C++?

Which of the following is true about friend functions in C++?

What is the purpose of using friend classes in C++?

Which of the following is an example of a friend function in C++?

What type of function can be declared as a friend function in C++?

Friend Classes and Functions in C++

The friend keyword is used to declare a friend class in C++.
A friend function allows access to the private and protected members of the class in which it is declared, breaking encapsulation for specified access.
Any function (including global functions and member functions of other classes) can be declared as a friend function.
The main advantage of using friend classes is to allow tight coupling between classes, facilitating access to each other's private data.
In a given example, if a class named Node exists, the friend class declared alongside Node is granted access to its private members.
A friend function can indeed be a member function of another class, allowing that member function to access private members of the class where it is declared as a friend.
An example of a friend class in C++ could be a class Graph that is declared as a friend within a Node class, enabling Graph to access the private members of Node.
The scope of a friend function is limited to the class that declares it as a friend; however, it can also access the private members of that class.
Friend classes in C++ do not have a special relationship involving inheritance; they only have access based on the friendship declaration.
Friend functions can be overloaded and defined outside of the class whose members they are designed to access.
The purpose of using friend classes is to allow mutual access between classes for better data management and functionality integration.

Test your knowledge on friend classes and functions in C++ with this quiz. Learn how a friend class can access private and protected members of other classes, and discover its usefulness in various scenarios.