JEE

No, you cannot get admission in DY Patil College in Pune or any other top colleges with 80 percentile in JEE Mains.

80 percentile is a decent percentile, but not enough to get admission in DY Patil College in Pune.

You may get admission in other private colleges.

60 percentage in JEE MAIN is not good enough for Assam University. While 60 percentage score might be enough for some colleges. Assam University generally require a more higher percentile.The cut-off for 2025 is out.The round 6 closing  rank for B.Tech computer Science and engineering was 58926, electronics and communication engineering was 67237 and for agricultural engineering the 6th round closing rank was 88476.

You can get tier-3 colleges like IMSEC, GFTIs, private college and less known nits/iits. You can easily opt for homestate quota counselling for a admission in your preferred college in your state.

It is seen difficult to take admission in CSE in NFSU Gandhinagar with 75 percentile in JEE mains  specially for OBC-NCL category. You can take admission in private colleges. 

You can download the official JEE Main Session 2 answer key directly from the NTA website: jeemain.nta.ac.in. Once released, the provisional key is open for challenge before the final version is published. Keep an eye on the latest notices on the site under "the latest News." Ensure you have your application number and password/date of birth ready to log in and check your responses and answer key comfortably.

For downloading previous year papers you can refer to various websites including the official website of NTA.
Apart from this there are multiple ways which include multiple websites which offer free pdf's of previous year JEE Mains question paper. If not downloadable they provide online pdf's which can be accessed by just logging in on the site.

Within 93.6 percentile in JEE Mains you can target a range of good NITs iits and other government funded technical institute (GFTIs) especially if you have a reservation. 

For general category you may need to consider some of the new year NITs or explore branches other than computer Science in nits.