Hey Aradhaya,

Hope you are doing great, regarding the online exams you are always provided with 3-4 blank A4 size sheets for rough work as without rough sheet it will be a great problem for one to solve any question. And regarding the sheet once the exams gets over you have to submit the sheets in the drop box you can't take sheets to your home.

Hope you found this answer useful.Stay motivated stay positive.

All the best!