Hello Santhosh,

The exact cut off cannot be determined because, it increases or decreases every year based on the various factors. But approximate prediction can be done based on the previous years cut offs. The safest rank for ST category students to get an admission in IIST Thiruvananthapuram is below 1000. If you manage to get this rank you can make it into the college. For more details kindly go through this link, https://engineering.careers360.com/articles/iist-btech-cutoff.

Good luck!