To secure a seat in the CS department at NIT Surathkal you will need a minimum score of around 235 in JEE Main. If you belong to some category then, you will need to score 180 or above to get a seat in CS.
In terms of rank, you should be safe if you have a rank of around 2500-3000. Here is the required cutoff for CS at NIT K in recent years.
Category |
HS |
OS |
General |
1000-1600 |
960-3181 |
OBC |
355-613 |
683-2550 |
SC |
158-259 |
376-968 |
ST |
82-105 |
219-222 |
EWS |
151-179 |
1071-1102 |
Hope this gives you some idea of what to expect.