DNB CET 2015 is commonly known as Diplomate National Board Centralized Entrance Test. DNB-CET is conducted by the National Board of Examinations (NBE). The DNB-CET examination is conducted for the students who want to take admission into various post-graduate courses in modern medicines under the NBE. The DNB-CET is a computer based test. The DNB-CET examination is held twice in a year.