It is impossible to take an inter-professional exam without any foundation. Even if you can take the exam, you can't get a professional qualification certificate.

Postgraduate is a kind of education in higher education, and postgraduate is the highest education. After graduation, you can also be called a graduate student, which means someone with a graduate education. After graduation, you can continue to study for a master's degree through exams, and a master's degree can continue to study for a doctor.