W: What steak would you like: rare, medium or well - done?
A: Medium, please.
W: And would you like vegetables or salad?
A: Vegetables, please. (implies yes)
Despite its syntactic form, the highlighted question does not require a yes/no answer. It is meant for the responder to say which of the two options he wants. The idea is that when you order the steak, there is a choice of accompaniment. You simply answer: Salad, please or Vegetables, please. It would be very unusual for someone not to order an accompaniment for a steak, and perhaps even more unlikely that someone would request both salad and vegetables!
There is no implication of any kind being made here—just a direct answer to a clear question.

Retired English Teacher