In my interview, the officer did not ask much except for the yes or no questions. Plus, some of the marriage history with abuser. How we got married and how many people were invited. Or if I have ever spoken to the abuser after the last incident. They did not get into abuse at all. While I was going through everything that had happened in my head for the past month and was reliving it again and again. But they were actually quite nice and decent. They did not bring up the abuse at all. They did ask the marriage and divorce dates but nothing I would not feel comfortable to share with them.
From my experience, I would suggest you to go over the application very very thoroughly and try to remember the dates as much as you can. Especially the dates of your residences. They asked me so many dates. Basically going over your I-485 application and anything that has changed in your life after that- be it employment, residence, marriage status, anything about parents. Just have a quick revision of what all has happened since you filed the application. Please make sure you have all the documents photocopied and their originals with you. Keep them organized so that it does not take much time to find them.
Please bring your I-693 medical in a sealed envelope if you have not already submitted with your application. It is very important. They will open it and go through it at the end of the interview.
Please keep us posted about your experience. Good luck!