Usually, students ranking in the top 300, get CSE, or IT at MPSTME, NMIMS. But this is just a tentative score. There is no such specific cutoff system. NMIMS Cutoff varies each year depending on the availability of seats.
So, try to score a good rank, to be safe. Since most students choose CSE or IT, the required cutoff remains high.
My friend is an alumnus of NMIMS and says that your rank is completely subjective to the others who had appeared for the exam. Your rank can be 100 or 1000. My friend had a rank of 1300 and he comfortably bagged a seat in the department of computer engineering.
It entirely depends on the vacancy and there is no system of cut-offs. If your rank is between 1500-3000 and your wish is to pursue IT or CE, you will most probably be disappointed because getting into the aforementioned programs is very difficult. A rank in the 300 to 500 range will grant you opportunities to get into CS or IT.
If your GPA is 3.5 or higher, you will have the option to change your course after the first year. It of course requires hard work to maintain such a high GPA. Availability of seats can also be a big factor in this case. The top rank holders are usually considered.