With the question regarding wing sweepback:
"Where does a swept back wing stall first"?
I simply answered: "It stalls first at the tips"
That was all they were looking for, they'd then ask the next question. Sometimes though they might want a little bit more but answer using as little as possible so that you do not start to dig yourself a hole. If they want to know more they will ask it. They do tend to be very straight forward though requiring very straight forward answers.
GD