Admission to Manipal is fairly simple for B.tech. You would have to appear for MET. Clear the cut off. Sit for the counselling round and secure your seat in your choice of college.

Details about the MET are here: https://manipal.edu/mu/admission/indian-students/online-entrance-exam-overview.html

MET 2016 Cutoff for Manipal Institute of Technology, Manipal in Computer Science Engineering's closing rank was 1893.

For more on cut off visit here: https://engineering.careers360.com/articles/met-cutoff