whats an exam? its different in different condition. i would like to specify what i think from my experience.
when i was in the university, its really a burden for me to take an exam, there are too many exams and it means too much for a student, especially seems some exams made no sense for someone, but we have to join it and get a high score, in this case, i think its kind of waisting time. but for other case, exam will help us to know more knowledge, such as some majority cause, its important, exam helped one to review what s/he studied and what s/he gained from it.
when i am in work like now, exams is not really the same meaning as the exam we took before, we always learned a lot from book and experienced it in our work, so its some kind of exams already and its more practical... we can gain more money from it, its more interresting and have more fun.
as what i said, i think its wonderful studying in work and serving for work. its a great exam not wasting time in the society-more risky, more fun.