@djinna...
We only had 4 week days plus 2 days in the weekend to prepare for our interview. You can imagine it was quite a rush with requiring a new police check and such.
The best thing my husband and I did to prepare for the interview was to go over all the questions. Several times. As well as going through all my family information. Even though my brother does not speak to me, we went through his information as well and sure enough the lady asked him about my brother. My husband was able to answer confidently that he knew his name and his kids names but had never spoken to him and the reason why. She was happy with this answer.
Yes, he was very stressed and he was nervous... but the practice really made a big difference. We used the list Fatimzahra provided plus any other questions we felt might be relevant to our situation. my husband wore a nice suit and arrived early. He had everything well organised in a brief case and photos in an album. I know for him having everything organised made him feel more confident.
Her biggest beefs in our case were the small wedding party and our cultural differences. During the interview she asked how we communicate because his english and french speaking is somewhat limited. But since I speak some french and a little arabic we are always mixing our languages so of course we understand each other well. He responded honestly that we will arrange ESL classes for him here and he will be immersed in an English speaking environment...he is going to have no choice but to learn it. :
She was also happy with this answer.
I believe that this kind of preperation will help your husband to feel more confident and will help him to answer the questions with more ease and information.
I wish you guys the best in the interview and for the future!