I do not believe it is put in order for the sake of the PMBOK guide, though it somewhat follows it.
There questions you may encounter that cross several processes or are not contained in the PMBOK.
The test is not intended to test you on the PMBOK, but to test your knowledge of project management and the ability to understand the concepts and think outside the box.
Do not get fixated on the outline, get fixated on understanding the process.