1. How is the size of the class affected if we define a virtual function in it? 2. What's the point of using the Singleton design pattern? What are the side effects of macros? 3. What is a...

1. How is the size of the class affected if we define a virtual function in it?

2. What's the point of using the Singleton design pattern?

What are the side effects of macros?

3. What is a class/function template? What is a template class/function?

4. What is a template parameter list? What is a template argument list? Once we have a class template, we can instantiate it either explicitly or implicitly. In what kind of scenario is explicit instantiation necessary?