I got prepsc 3390 rank in jee advanced. I filled all my choices CSE. And I didn't get any seat until 5th round.what should I do?....

Hello aspirant ! You have a good rank in jee advance but you might have made a mistake while choice filling. You might have filled such colleges as your preference which has very less closing rank for Cse branch. Therefore you might have not got Cse in the 5 rounds. You can take other branches as per your preference that you have filled or you could wait for the next round maybe you can get a seat there.

See you have secured a good rank but as of now CSE branch is in much demand would it have been in the line of hundreds of rank then there would have been a chance to get one. But as of now just wait for spot counselling as well and truly try that too. Maybe you will get one.