I know it's short of 지요 but how do you use it in questions and what else do you use at the end of the questions if not this ?
You would use 지요/죠 at the end of a question where you want to "check" with someone. As in, not a regular question, but you know the answer and you want to check if someone agrees with you.
Delicious isn't it? (You aren't really asking, since you already think it's tasty, you are kind of just expecting them to agree with you).