Can I attend IIITH while in notice period in my current job in Hyderabad?

I'm currently doing a job & planning to give PGEE. If we assume results are announced by May end and I resigned according to results, I've to serve 3 months notice period probably end by August end.

Do we need to submit anything to college while joining like resignation letter or experience letter?

If not, I'm planning to use leaves efficiently and manage attendance on border.