What is C++? Explain its key features and advantages over other programming languages. What is the difference between C and C++? Highlight their distinct features and use cases. Explain object-oriented programming (OOP) concepts in C++. Describe classes, objects, inheritance, polymorphism, and encapsulation. What is the Standard Template Library (STL)? Discuss its components like vectors, maps, and algorithms, and provide use cases. What are constructors and destructors in C++? How do they differ from regular member functions? What is the "this" pointer in C++? How and when is it used in class methods? Describe the difference between shallow copy and deep copy. When might you choose one over the other? Explain the concept of operator overloading. Provide examples of when and how operators like "+", "==", and "<<" can be overloaded. What is the virtual function in C++? How does it relate to runtime polymorphism? Discuss the differences between function overloading and function overriding.