Recently i have undergone interview for visiting visa.. I am
sharing the questions that are asked to me in Delhi Canadian
embassy that might help to you..
1) General introduction like when u have been to delhi.
2) When did u met ur spouse first time.
3) Have u seen him before marriage, Who brought the match
4) Were u in contact after marriage.. Like phone or chat..
5) If ur spouse is working then NOC from concern department.
6) Wedding album 
these all the questions i faced