For admission into MBA programs B-schools in USA , UK and other countries need to appear the following exams. Based up on the score you got the school decides to give admission or not in the respected course.

GMAT is widely accepted by many B-schools. In addition to that some schools require other exams

The Graduate Management Admission Test (GMAT)

Graduate record examination (GRE)

International English Language Testing System (IELTS)

The Test of English as a Foreign Language (TOEFL)