Thanks everyone, the documents requested before interview were, marriage certificate, his birth certificate, school and passport all originals and the questions during the interviews were, when was ur son and wife born, where does ur wife leave in Canada? Where does she work, what does ur wife do in a typical day, why have u waited when ur son is 3yrs then decided to apply to come to Canada, and then they asked him where he is working almost everything asked was submitted with our application. He was then told he passed the interview.