what does full hands in and full hands out mean?

Question

for Server's Job

Answer 1

You're either taking trays/dishes out to customers or bringing empty plates/dishes back to the kitchen.

Answer 2

Whenever you go into the kitchen take some dirty dishes in with you and whenever you leave the kitchen take something out with you (clean dishes?) Don't walk around empty handed.

Answer 3

It means that when you take something out to a table such as a drink or food you bring something back off their table or surrounding tables. This could be a plate that someone is done using, empty glasses or anything else that needs to be cleared from their table.