What is the difference between a struct and a class in C++? What is polymorphism in C++ and how is it achieved? What is a virtual function in C++ and why is it important? What is an abstract class in C++ and how is it different from a regular class? What is the difference between a constructor and a destructor in C++? What is the difference between pass by value, pass by reference, and pass by pointer in C++? What is a template in C++ and how is it used? What is an exception in C++ and how do you handle it?
