Cpp Developer Interview Questions and Answers

Virtual functions allow dynamic binding while friend functions can access private members of a class.

• Virtual functions are declared in base class and overridden in derived class for dynamic binding.

• Friend functions are declared outside the class but can access private members of the class.

• Example of virtual function: virtual void display() = 0; // pure virtual function

• Example of friend function: friend void displayDetails(); // declaration inside class, definition outside

Oops concept is a programming paradigm based on the principles of object-oriented programming.

• Encapsulation: bundling data and methods that operate on the data into a single unit (class)

• Inheritance: ability of a class to inherit properties and behavior from another class

• Polymorphism: ability to present the same interface for different data types

• Abstraction: hiding the complex implementation details and showing only the necessary features

Reversing a linked list involves changing the direction of pointers to go from the end to the beginning.

• Start by initializing three pointers: current, prev, and next.

• Iterate through the list, updating pointers to reverse the links.

• Update the head pointer to point to the new beginning of the list.