Getting an 8.5 GPA at NIT Trichy depends on certain factors. Below I have talked about each one separately-
There is a system of Relative Grading(RG), so your GPA also depends on your classmates’ performance.
If you regularly attend classes (maintaining at least 75% attendance), keep yourself updated on all that is being taught in the class, and study well before your CTs/unit tests, and end sem, you will easily score 8.5 or above in NIT Trichy.
On the other hand, if you are a lazy person who sleeps for 12-14 hours a day, will bunk your classes regularly, and play PUBG all day, you won’t score well.
Attend your classes regularly and try to study for 2-3 hours a day. Maintain at least 75% attendance. Try to score well in your CTs and Unit Tests, then you will be less worried during your end sem.
You can not control the performance of your entire class, but if you follow a disciplined and balanced routine, you will make sure from your end that you score well as a student of NIT Trichy.