An entity relationship diagram tells you about data flow and is a fixed view of the database structure

What is meant by a second-level page? A third-level page?

What will be an ideal response?

If three different variables need to be “returned” from a function, how should the function be designed (without using global variables)?

A. Use a call by value. B. Extern the variables. C. Use a call by reference. D. It is impossible to do this in C++.