If you are working in your PMP Certification preparation it means that you have some experience. Then, the easy way to understand the organizations is reviewing you or your friends company organizations, with real examples will be easy to understand. Saving Changes...
Apart from the suggestions given, one more thing you can do is to practice more and more mocks. You will get different types of questions for all types of org.
Also 1. Functional means every decision should be taken by Func. manager.
2. Weak means a little decision can be taken. Look for hints where coordinator is mentioned which is taking a decision.
3. If nothing is mentioned then assume Balanaced matrix and answer.