As per the New Education Policy of the Government of India Exams in UG programs are taken on Semester-basis. And I think No exams are easy or very difficult to pass, it depends on your dedication level to obtain good marks. If you give little efforts you can easily pass the exams.

The quality of teaching is excellent. The curriculum followed is Patna university is not on par and hasn't got a major refresh since the start. The teachers are mostly friendly and will help you when you need them.