Numerus fixus means a program has a limited number of seats, so admission becomes selective and competitive. Courses like Medicine, Dentistry, Physiotherapy, Dental Hygiene, Veterinary Science, Psychology, and some International Relations programs use this system, and students must go through an additional selection process beyond meeting basic eligibility. Because seats are capped, even highly qualified applicants may not be admitted, so you should apply early, prepare strong documents, and keep backup options.