do we need examination? why?

yes. all of student need an examination because we can make someone know what their level either good or not. if not good our subject. we can improve the subject for the next time and also to do the best. if dont have examination, teacher can't know the level someone of student. besides, examination also important to we for improve our subject if their result not the best. examination also important because from there,we can to repair our study, from not bad to the best.