Question about the Pressed Penny Machines

Hello this my first time asking a question on Reddit so please forgive me if I do this wrong but on to the question. On the pressed penny machines found all over Disney world do you get change back? Like if I put a $5 bill on a machine that does only 4 coins which would be $4 total would it give me back a $1 or 4 quarters or does it have to exact change on these machines when using cash? Also can you use a DisneyWorld /disneyland gift card on these machines?