very normal questions:
How many siblings you have? what they are doing? where they live ? What's your father do ?
Your wife is your relatives ? as she is ..... you both born in same city ? etc
what is educational background ..... from where you did graduation ..... then what you did after graduation etc.
Your job title ..... for which company you work etc
extra Documents which they didn't ask to bring but they have checked.
1. All educational degree's, transcripts and any training certificates etc
2. marriage certificate (I didn't have the original one, I have shown him the photo copy. My always keeps the original one
)
3. New police certificate (if your case is in process since more than 10 month just make your new certificate before going for interview) because they have asked my new certificate and I gave them on the request of IO.
4. They also checked the letter from my employer + ID or your business card or any ID (clock in ID etc)
5. They have also checked my passport (keep your expired passport is also with you)
6. New recent pictures
7. Keep all the phones bills emails, cards etc
8. If your medical is expire and you have did the new medical, then keep the receipt of the doctor.
These are very important documents and they have checked all but in the letter of interview they have only requested to bring your passport.
If you haven't paid your right of residency fees (490 dollars) then I would recommend pay it. After interview they asked me to pay this fees and it will take 2 weeks to come in their system
My experience is The IO was very nice, kind, polite and friendly person. Don't get tense or lost your temper at any point.
Wish you good luck friend !