List and explain at least two mechanisms by which a parent process communicates information to its child process.

List and explain at least two mechanisms by which threads synchronize with each other.

In what situations can a QTimer be used instead of a QThread? Why would one want to do that?

What does it mean for an function to be thread-safe?

Which class can be used in non-GUI threads? QImage or QPixmap?

What does it mean for a function to be reentrant?

How do you tell a non-GUI thread to enter into an event loop?

Without using extra threads, how can you keep the GUI responsive while still performing a long-running loop?