Dear,

IIST takes admission through JEE Advanced and IISER consider KVPY, JEE Advanced and SCB channel to take admissions. The institute offers admission in B.Tech course through merit list based on JEE Advanced score. The institute do not conduct any entrance and admission is solely done on the basis of JEE Advanced scores. The cutoff for general category is 20% of the marks. For further info you can visit:

https://engineering.careers360.com/articles/iist-btech-admission

Hope this helps!