The Permeant Committee said about supplications used for exams:

“These supplications for study and success which vary from one case to another to be said by the student in studying are considered Bid`ah (innovation in religion), as there is no mention in specifying them in such a method in the Qur’an or Sunnah of the Prophet (peace be upon him). Certainly, what has been mentioned of Qur’anic verses or Prophetic traditions has been reported for specific or general reasons for the sake of invoking, beseeching, and seeking refuge to Allah and entrusting Him (Glorified be He) in all life’s affairs which might face humans.” End quote. [Reference]

Mentioned by

AbdulFattaah Bin Uthman
Abu Fajr