Hello Aspirant,

Unfortunately BITSAT question paper of 2021 is not available with us but yes you can practice some sample papers which are completely based on the same pattern as that of actual BITSAT so you can download the sample papers from the link given below :-

BITSAT Sample Papers 2022/Practice Papers - Download PDF here (careers360.com)

Also you can attempt BITSAT mock test so that you can get familiar of a way that how to give BITSAT in real time, you can check out the link given below for mock test of BITSAT :-

BITSAT Mock Test 2022 - Practice Your Mock Test Here (careers360.com)

Also you can check out BITSAT knockout program to for best study material :-

BITSAT Online Preparation Crash Course, Mock Test, Kadha & Practice Test Series 2022 (careers360.com)

I hope this information helps you.

Good Luck!!