Postgraduate Exam Or Not

One of my college classmates told me that he had quitted his job because he was preparing for the entrance exams for postgraduate schools. He said he want to be a policeman when we talked about his ideal job. It is a pity that he can’t take part in the entrance examination for government employee as he hasn’t passed the CET 4. I really want to suggest him passing the CET 4 instead of preparing the Postgraduate Exam. I finally don’t do that because I am afraid to cut down his determination. What I can do for him is wish he good luck.