PES University

Depends on what kind of life you want to live. If you are in the boy's hostel class is like 300 m from your room (if you can manage to get the hostel). There are a number of canteens in the campus for better food. Also, the campus is small so you don't have to walk much. Only attendance is a bit cumbersome (75%). There is a big cricket ground where you can play. Overall the life is fun.

Yes, PES University is a good for CSE. I am myself pursuing CSE branch from PES University. The placement for the CS branch is good. The reason why I opted CSE in PES was placements.

It's neither too good nor too bad. During first 2 years it's fun but if you end up enjoying all the time,you may end up performing average in academics. I didn't mean to study all day. It teaches time management, manage your priority. Experience and enjoy your college life. If you fail,you'll learn and grow. Don't ever fear failure nor stick with it.

Since PESSAT is an online exam so previous year papers are not available. Still, if you want to solve you can search for COMEDK previous year papers or BITSAT previous year paper. The difficulty level is somewhat similar.

PES University is better for its consistent placements and good branding and faculty. Jain University lags behind in rankings. If you're satisfied kindly upvote and follow.