Hello aspirant

hope you are doing well and safe. With reference to your query,  I would glad inform you that at  4021 rank you have good chances to get admission in Cochin University College of Engineering, Kuttanad for computer science . Rest in all other options you will get NON-IT branches. I would recommend you to look for this and refer the following link for cut off-

https://engineering.careers360.com/articles/cusat-cat-cutoff

Hope you found this answer informative. Best wishes for your future