My appointment was at 12:30pm. I arrived around 12:10pm. The interview started around 12:40pm. It was done within 20 mins.
The interviewer went over the application form with me. He took my temp green card. Checked my passport.
I was tested 6-7 questions.
What's the freedom of religion?
How many US Senators are tehre?
Who is one of your state's US Senators now?
When was the Constitution written?
Name one problem that let to the Civil War?
Name one state that borders Canada.
The interviewer asked me to write down- Washington is on the dollar bill.
Don't bring your digital camera. Cell phone is ok.
But don't bring your cell phone when you go to the bio fingerprint. I was told that no cell phone allowed.
I mailed out the N-400 on April 28. The fingerprinter appointment was scheduled in May. The interview was on July 31.
Hopefully, this would be helpful to you.