This document discusses key concepts of object-oriented programming in C++ including inheritance, polymorphism through virtual methods and interfaces, and other related topics. It covers inheritance and protected/private/public access modifiers, the order of constructor/destructor calls, method overloading and overriding, pure virtual methods, interfaces, C++11 keywords like override and final, and forward declarations.

1. How OOP works in C++

2. Inheritance
• What it is and why it is needed
• Protected members
• Order of calling constructors/destructors
• Types of inheritance
– public
– protected
– private
• Methods overload

3. Virtual methods
• Pointers to base class can point to derived
object
• Why it is needed. Method overriding
• Calling basic class methods
• Do not call virtual methods in
constructor/destructor
• Virtual destructors

4. Pure virtual methods
• Pure virtual methods
• Do NOT call virtual methods in
constructor/destructor
• Do not call methods which call virtual
methods in constructor/destructor

5. Interfaces
• What is called interface
• Why it is needed

6. C++11 keywords
• override
• final

7. Forward declaration
• What is it
• Why we need it