The Unicamp national exam is very competitive and is considered one of the most difficult in Brazil. In 2015 there were 77,145 applications for only 3,320 possible places, with 23 candidates competing for each position in an undergraduate program, an average acceptance rate of 4.3%. The exam covers all topics taught in the Brazilian high school system, including Portuguese, mathematics, Brazilian and world history, geography, biology, physics, chemistry, sociology, philosophy, arts and English. Despite that, questions in the exams are generally interdisciplinary.