Are you getting ready for the Spouse sponsorship/Family Sponsorship Interview at the Embassy.
My wife had gone thru the similar process.
First of all. Have you gotten the Interview Date from the US Embassy yet.
If yes, then Interview is not the most difficult part. The most time consuming part is the process of getting all the documents together.
It took me 2 years, for my spouse to get the interview date, as the US Embassy now takes very long time to process. The faster route is to bring your Spouse to America thru Fiance (Mangetaar), K-3 Visa. I don't know your situation, is it for Fiance, Spouse, or other sponsorship.
As far as questions are concerned, they just asked my wife, how long she knew me, Where I worked, How long have I lived in US, just to cross question how much your spouse knows about you and whether you are sincere towards eachother. In otherwords, the sponsorship is Genuine and not just Paper Marriage, to bring the other person to US for Money, as many Desi people have done in the past.
So, to make it short, the questions asked at the interview are not hard at all, just make sure you have submitted all the right documents, the Affidavit of Support, The medical history, the Police report from Local Pakisttani Police, etc. There are tons of documents, I personally had to submit over 200 pages of documents and it took 2 years to process the case, and I am US citizen. If it takes that long for US citizen, I don't know how long they take for Interview for Green Card Holder sponsors. This is just my input from very limited information you have provided.
And oh yeah, Good luck at the interview.
If it is indeed you who will have the interview.