No books in hand for exam

there are so many people who have extraordinary memorization, even before the exam there is no need to read suddenly, he has maximized his study time during the months before the exam, so they don't have to worry about bringing books for last-minute reading. I really salute them, and fascinated with them. not reading a book before the exam can increase confidence and make us calmer in facing the exam, because we have prepared it long ago