Dear Aryan, IISER is an Aptitude test for admission into 5 year BS-MS degree.programmes. 7 Institutes participate in this programme. IISER stands for Indian Institutes of Science Education and Research. Admission into these 7 IISERs is conducted through 3 channels, KVPY, JEE and SCB. IISER admission test is for those candidates who are looking for admission througb SCB channel. This is an integrated program which involves BS and MS studies. These Institutes promote higher quality education and ground breaking research opportunities which is more advanced than B.Sc in terms of curriculum, objectives, infrastructure and opportunities. Hope this helps.