Hello STudent

To study in Korea whether it is medicine or Technology candidate has to to clear the korean language test that is TOPIK test. For undergraduate program in Korea candidate has to pass the Test of proficiency in Korean language Topik3. And for graduate program candidate has to to take the test of proficiency in Korean language Topik 4. Other than these candidates have also to clear the ACT and SAT exam like  to study in America. Act for American college test that determine the candidate's eligibility of thinking , writing , speaking and analytical ability in Science topics also. SAT is for scholastic Aptitude Test which denotes the scholastic outlooks of the candidate.

So test of proficiency in Korean language and sat and act are also compulsory to study in in Korean Yonsei University for undergraduate medicine course.

Hope this helps.