Can I directly write exam without appearing jee (mains)

Hello ..

• If you want to get an admission in IISER in 2019 the admission process will be taken through three channels. They are :
• 1.KVPY
• 2.SCB
• 3.JEE

If you want to get admission through JEE and KVPY you can get the admission directly but if you want to get the admission through SCB you should write an aptitude test.
If you are KVPY(Kishore vaigyanik protsahan Yojana) valid fellowship you will get direct admission.
So if you are not a KVPY fellowship you can go for SCB
For more details refer the link https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/iiser-admission&ved=2ahUKEwjt_Y63o43gAhUBqY8KHaT5CTwQFjAEegQICRAB&usg=AOvVaw1Slh-qzC1wYDcT_KZlLs0O&cshid=1548569096904