Questions

As usual, here are some questions to test and maybe deepen your understanding of the material in this chapter.

1. Why is a data race an undefined behavior (UB) in C++?
2. What does resource acquisition is initialization (RAII) mean? (we have seen it already in Chapter 3, Deep Dive into C++ and Performance) and how it can be used in QAtomicLocker?
3. Why can volatile variables not be used to prevent race conditions?
4. What are spurious wakes and why aren't they banned?
5. Assume you are an OS (or some tool) and have just detected a deadlock. What could you do to resolve it?
6. What is cache ping-pong?
7. If you define slots in a QThread subclass, what do you think will happen when they get invoked by a signal?
8. What do you think, the Windows system call InitializeCriticalSectionAndSpinCount() could do?
9. What do you understand about using QProcess instead of QThread?
10. What does the phrase...