I-485 - Finger print and interview related...

[haveQs]

My parents had filed for I-485 3 years ago in Houston distrinct office. INS has now called them for Finger prints. I have a few questions regarding the same..

1.After the finger prints, how long does it take to be called for the interview?
2. what do they do/ask in the interview?
3. What papers/documents should they carry with them when they go in for the interview?
4. How long does it take to get the green card after FP/interview?

Thanks

[immihelp]

You can find answers to most of your questions right here on this web site. Read I-485 section.