Whether or not your university knows exactly what your parents do, they will know from the amount of financial aid they recieve from your LEA and the amount of loan and support you get how much they earn, which iin my opinion is a far more personal thing. Does it really matter if they know what job your parents did too? Personally, neither of my parents entered higher education, although my Dad wishes he had rather than doing college at night and a full-time job during the day. Anyway, asa someone said there are obviously a lot of people of the parent's generation who didn't, so its hardly going to be a shock or horror to them.