Just returned this past weekend from our Nashville field office interview on Thursday. I forgot which civics test questions the IO asked my wife, but she was successful in getting 6 right. After the reading/writing portion of the test, he hammered quite hard on some of her time in Switzerland (and the overstay that occurred...), how we met, if I was a US Citizen, did I file my taxes, and finally discussed her name change request. I did not go inside since I had our 2 daughters with us.
He approved her at the end, but told us we'd potentially have to go to Chattanooga for our oath ceremony (Yeah....weird when there is a federal courthouse in East TN that does it that is closer....), but checked statuses online:
Her I-751 was approved and card is being printed
Her N-400 was approved and is currently awaiting Oath Ceremony scheduling.