Choose the FAA knowledge (written) test that matches the certificate or rating you're pursuing — for example Private Pilot Airplane, Instrument Rating, Commercial Pilot, Remote Pilot (Part 107), or an Aviation Mechanic test.
Only exams that currently have questions loaded appear in the picker, and you can switch exams anytime from Exams. If you're unsure which code you need, see "Which FAA test code do I need?"