What is the meaning of the term "Concept", when it comes to studies. By what means can one enhance his concept?

Having concept means that the person has understood the mechanism of that particular thing...& he can solve numerous questions from that topic cause how twisted the question may be..the person understands the loop hole of the topic. Ofcourse the person who works hard, who is dedicated towards his studies & owns conceptual clarity..can crack any exam..not only JEE..& conceptual clarity is obtained by working hard on the subject in the form of concentrative sudy & practicing lots of questions..& remember that the harder you work, the luckier you get.