hi,

niser stands for national institute science education and research. it has an entrance exam call NEST which is gate way to study basic science course in niser.

Please follow the below link to know more details:

https://www.nestexam.in/

Now come to IISER, YOU CAN GO FOR BS-MS dual degree course in different iiser through KVPY exam, or jee main advance or

Scb (only top 1%of board students are allowed) - 50%of the seats at iiser are alloted through the IAT exam they conduct.

hope you may understand.