I am a medical examiner. I want to know what the hospital entrance examination is about.

Entrance exams vary from place to place, and specialized courses are definitely required. In some places, foreign languages have been added to specialized courses, and in some places, administrative professional ability tests have been added to specialized courses. It doesn't matter whether you do well in the exam. If you want to by going up one flight of stairs, you'd better improve your education. This is a threshold, and it is recommended not to cross majors, except clinical practice.