İstanbul University, the biggest and oldest university in Turkey, administers the International Student Exam (IUYOS) to place both foreign and Turkish students who completed high school abroad on undergraduate and associate degree programs. The quota for international students is limited and is determined by the Higher Education Institution (YÖK) in Turkey.

In 2014, more than 6,000 candidates took İstanbul University's International Student Examination (IUYOS) both in İstanbul and in 13 centres around the world. The results of this examination are accepted not only by İstanbul University but also by 93 public and private universities throughout Turkey. In 2015 the IUYOS examination is scheduled to be held in the cities of Turkey İstanbul, Erzurum, Van, Gaziantep and abroad; Almaty, Amman, Ashgabat, Athens, Komotini, Baku, Berlin, Cologne, Bern, Beirut, Bishkek, Cape Town, Dubai, Erbil, Islamabad, Kabul, Cairo, Kuala Lumpur, Khartoum, Paris, Prishtina, Riyadh, Jeddah, Sanaa'a, Sarajevo, Tehran, Tbilisi, Skopje and Washington DC. The examination will be administered in all of the test centres on 16 May 2015 by İstanbul University officials and will be conducted in both Turkish and English.