Are you interested in passing the Part 107 Test? Well, as with any test, you must know and actually understand the material.
If you do not know airspace regulations, you should at least attend some online classes specialized in the unmanned aircraft test. That is one of the best ways to pass the test.
If you, on the other hand, already has some familiarity with FAA regulations, you can find the raw legislation on the FAA site. You should start your studies there. There are a few study guides on YouTube as well. You can also search online for free practice-test websites. Some other sites give you answers to actual test questions, and explain the answers too. Taking a practice test is very helpful. You can also take the practice tests multiple times until you feel more confident.
After doing that, you will be ready to find the closest test center to you and take the Part 107 Exam.