Hi Prince. Registrations for admissions in  IIST B.Tech will commence from May 22 in the online mode. The last date for registration is June 5. There is no entrance for the admissions. But admissions will be given on the basis of JEE Advance scores. For more details you can visit https://engineering.careers360.com/articles/iist-btech-admission

I hope this information has helped you:)

Indian Institute of Space and Technology (IIST) offers undergraduate courses like B. Tech in Aerospace Engineering, B. Tech in Electronics and Communication Engineering (with specialization in Avionics). The institute also offers 5-year Dual Degree programs. 

To get admission in these undergraduate courses in IIST a student must have score at least 75% aggregate marks in Class 12th. Also the student must give JEE Mains qualify in it and score well in JEE Advance. After all the registrations are done and final list of students is released.

If you still have any queries feel free to ask in the comment section down below.