To get admission in American universities/institutes and universities of other countries you have to clear international entrance exams. The amount of scholarship you get also depends on your performance in the entrance exams. Therefore, it is very important to get a good score.
There are a plethora of international entrance exams such as SAT, MCAT, LSAT, GMAT, GRE et al. catering to different educational courses. Each exam has different test pattern, scoring pattern and requires different preparation strategy. Here is a comprehensive guide covering all the vital aspects of some of the most important international entrance exams