My opinion about exams

I think the exams are important for some things, like  find out your level in some subjects, but I don´t think they are the best option, because if you study for a exam, problably you may forget what you study in some weeks more or less. In my opinion I would do works or exercises of the subjects studied to not forget what was studied. Definitely I think that the exams serve to evaluate your level one day and are not useful for evaluating you temporarily.