Can I take a sick leave certificate to be absent during the notice period?

Good morning.

Please, I would like to ask.

Can I take a sick leave certificate to be absent during the notice period?

I am not feeling well and planning on taking a sick leave for two days. Will these two days be deducted from my gratuity?

Also is the notice period month salary paid by the employer? Or I do work for free for the whole month?

Thanks in advance