To obtain a certificate or add a rating, a pilot usually has to undergo a course of training with a Certificated Flight Instructor (CFI) under 14CFR61 or enroll at an approved course at a 14CFR141 approved flight school. The applicant must accumulate and log specific aeronautical experience, and pass a three-part examination: a "knowledge test" (a computerized multiple-choice test, typically called the "written test"), an "oral" test, and a "practical" test carried out by either an FAA inspector or a Designated Pilot Examiner.