After my friend's student visa expires can she get a tourist visa?

Hi everyone!
My friends has a student visa for 1 year.  Is it possible for her to get a tourist visa atthe end of the year to extend her stay?  If yes would she need to leave the country?  (She lives near the Uruguay border)

Thanks everybody in advance for the help!😊

Part of my above question: is there a waiting period to reenter Brazil after a student visa expires, like with a tourist visa?