MSC colleges and their admissions process

Some M.Sc colleges are
TIFR,IIT,IISER,IISc,DU,JU,BHU,JNU,CU etc
TIFR: to get admission here you have to give their two stage test which comprises of a written test and interview.
The exam is usually conducted on every December.
IIT:IITs conduct IIT JAM every year as their admission test.This is an online exam.Every year it's conducted on February.
IISER:Some IISERs take admission according to your JAM rank.Some also take admission tests and interview.
IISc:Only considers your JAM rank
Other colleges have their separate entrance exams .
Most of them are conducted on June.