Don't be too hard on yourself. If it makes you feel better, when I applied for a child care job I made the totally inappropriate comment, "I love 'em to death" about kids, after which there was a long and uncomfortable pause during which I considered what horror movies the mother might have watched in which babysitters make this comment only to end up being mass murderers or something. (I got the job anyway, and it was one of the most fun jobs ever.) In the end, it's all in the competition, and guaranteed, nobody answers every question perfectly.