(FR) QQ vs 4bet pre

Call the 4bet in position. I think it is a pretty easy call. 5bet vs MP without some solid background or table dynamics is too much with QQ. AK would be a better 5bet for instance because you block AA and KK that might call/shove.
Postflop depends on the board and villain's action, so there's no way someone can answer what to generally do.

It's tricky to call I think with already more than 1/4 of your stack in the middle and is easy to get committed on the flop if he Cbets on when you have a over pair. On NL5 is not to bad to fold I think against a unknown and if you have reads he's aggressive you can always stack off. I would push or fold with so much chips in the middle pre-flop.

Cheers,
SDK1987

Villain had

I think a 5 bet against unknown guy opening from MP could be overplay. Still wouldn't fold this hand --> my option would be to call.
Postflop depends on the board and villain's bet size.

We could also consider the population tendencies. I believe people 4bet quite tight. In such a case I don't think it would be horrible to fold QQ at least with some frequency, especially against such large 4bet.