Even within the same country, grading schemes can vary, but in order to get credit for the required courses mentioned above, you need the equivalent of a B or better in a lecture course (as opposed to a laboratory course). For universities in India, this generally means at least a "1st class" grade (usually 55% or better) as opposed to simply a passing grade (usually 40% or better). We do want to see students succeed and reserve the right to require higher grades if we find that students are not prepared for what we expect of them.
The standards for admission vary with how many applicants we receive. Generally, successful applicants should have over half of their Mathematics and Computer Science courses at a B- level or better. Because there is a limit to how many students we can take, we cannot accept all qualified students.