The purpose of the exam is to tame your mind. We are influenced by our mind. When humans lived as hunters and gathers there is no fixed law and punishment. Humans roamed like a beast. This is because there is no discipline in men to form a civilisation. If you form a civilisation you should control yourself and behave decently. This can be acquired unless and until you tame your mind to be quiet.
The curriculum in school is to bring discipline in you, that is to tame your mind. You are asked to learn the basic structure of society by sitting in one place. The school is more about arresting your movement and to sit in one place to go through the lesson and repeat it in exam. The more you excel in exams, you are more far away from your instinct mind. A knowledge mind will behave slowly and sensibly at the time of crises. The knowledge helps less violence and more silence to understand the situation.
What you do when preparing for exams. You tie yourself to one place and learn the lesson and try to bring it into your own language of understanding. The Silence in sitting and reading is nothing but a meditation. The silence helps you to understand the lesson and add to it your knowledge. You know this world better than the uneducated and you are more successful than the uneducated.
Examination is more about seeing you through your grade..
How you tamed and using your mind at will.