Chapter 2

1. Yes. Most of the C standard is also part of the POSIX standard. POSIX generally goes above and beyond to provide additional facilities specific to POSIX operating systems. Examples of C and POSIX functions include read() and write().
2. _start() is the entry point to an application and is usually provided by the C runtime facilities. main() is a function provided by the user and is usually the first function to execute in the user's code, which is eventually called by the C runtime facilities once the application is fully initialized.
3. Executing global constructors and destructors, and initializing C++ exceptions.
4. Before.

5. C++ name mangling embeds the entire signature of a function into the function's symbol. This is not only needed to provide support for function overloading in C++, but also ensures that the linker doesn't accidentally dynamically link...