Exam

Yes, you can go for NID. Stream does not matter in UG. Application is out for the entrance session 18-19.

50% aggregate in your graduation.

Most of the colleges accepts December and February MAT scores. Although it is always an option, which MAT score you want to apply with for that college. So, whichever score you find better you can apply with that.

Students taken can range from 60 to 80.

You are eligible for ISRO examination, based on your educational qualification subject to meeting other eligibility criteria. Your duration of doing B.Tech in 5 years may not impact your chances in clearing ISRO entrance examination. However, you may have to explain reasons for taking one year extra

Admission in National Institute of Engineering, Mysore in B.E. (Lateral Entry) is based on Karnataka CET.

Hello Vishvajit,
GATE - graduate aptitude test in Engineering is a national level examination conducted for the admission into post graduate studies such as:
M. E/M. Tech, M.Sc etc. in the government colleges.
It would give you a chance to get admission into the IITs and other top institutions for post