Generally, student who will have an exam are under stress and pressure ,they often find it difficult . To be natural , so the result come as not expected .thought, they have got good mark during thier school year , this is due to many reasons.
This student forget that ,they have to organize thier time for revision .Thus ,when the examination draw nearer they start cramming yet, they sometimes have mental fatigue which lead to brain breakdown in the days of exams.
Students must be psychologically prepared for the exam because the natural feeling of scare is dominant in this period . Consequently , many of them lose consentral and even forget what they have already learnt by heart.