It is necessary to take the exam, and it is very necessary. Now, education is a stepping stone to all industries. Even if you want to go to the auto repair industry, there is training in junior college or undergraduate course, which is definitely better than the teacher. Moreover, going to college is not necessarily to learn technology, but to increase knowledge and expand interpersonal networks. In a word, you will gain something after studying in the university. Auto repair is also a very popular major, with good prospects and employment rate.