Does D40 'focus trap'?

I think the D40 probably does not do the 'focus trap'. I am assuming that the camera will take a picture even if the picture is out of focus with the 50 mm lens even if the camera is set on AF-S.
--
D 8 0, D 7 0, 1 8 - 2 0 0 v r, 5 0 f 1 . 4, 1 8 - 7 0 (sold)
1 0 5 v r, T o k i n a 2 8 - 7 0 f 2 . 8 p r o - s v, S B 6 0 0
N X, N V, N C, P P, P S E 4