Dear students in arms,
There are two aspects to consider here that are relevant in undertaking any exam. The first is the psychological and the second is technical; I will try to elaborate on both holistically.
From the psychological side we have to realize that we ourselves are our greatest teachers; tutors and professors can show us the way but we have to travel that path ourselves. A person who is determined and keeps on pursuing ultimately gets his/her rewards, with or without any tutor. Later onwards in our lives we will realize that ‘one repays a teacher badly if one always remains only a pupil’ (Friedrich Nietzsche).