Just got back from the interview. Everything went off smoothly. The officer was a middle aged moderately hot lady. My appointment was for 8:10AM. The office opened at 8AM and shortly after 8:10, we were called for the interview. First the customary oath, then she asked for both of our IDs. She had my file and all the submitted forms in front of her. First she started with my wife and verified her name, dob, ss#, address etc. Then she did the same for me. Next she asked how many kids we have and asked a copy of our daughter's birth certificate. Then she asked me all those questions like 'whether I've committed a crime, any prison sentence etc.' It was quite obvious that she was doing a formality as she was mocking and smiling while reading out those questions to me.
Then she told me that I have to withdraw my still pending employment based 485. I was prepared for that. She printed out a form that I duly signed. She didn't ask for anything else, no marriage certificate, no joint assets nothing. She finally told me that I should expect the card in a week or so and if I don't receive it within a month's time, then I should make an infopass appt to inquire. She didn't ask to see my passport, nor did she ask for the I-94. But I made a small mistake there by voluntarily asking her whether she would like to keep the I-94. She asked me whether I plan to travel abroad in the next few weeks. I said 'no', and she took the card. I feel that was a mistake on my part as you never know there may be some emergency and I may need to travel. Then it will unnecessary complicate matters which could have been easily avoided. Anyway, let's hope for the best. Also, she told me a few times that I can apply for citizenship after 3 years and the GC is valid for 10 years.