1-Aptitude- based College Admission Tests- SAT,GRE and GMAT. These are tests that you need to give in order to seek admission at foreign universities. That is, if you are applying for an engineering undergraduate course in America, then you need to give a SAT exam to be eligible to apply for admission in an American university. You can call it an 'entrance' test for college admissions, like the ones happen in India. The SAT, GRE and GMAT are admission test, based on aptitude testing. Through the test, the examiners want to test your eligibility for that particular course and stream.