GRE, I believe, is one of the easiest exams to get through - easier compared to what we have here in India. The mantra is to mug up everything and then practice, practice and practice.
Almost all universities in North America require applying candidates to write GRE as a qualifying requirement for their graduate courses. You can write the exam anytime in the year, and once in a calendar month. Yeah, that’s right, if you do not score well in your first attempt, you can always write it again next month …