Update: 11/09/2023
Here is my experience about my combo interview of (3 year eligibility) I-751 and N-400 today at Portland Field office in Maine.
We arrived 40 mins early, the security guard at the entrance was very nice and welcoming. There were at least 12 more applicants waiting for their Interviews. Our interview started 15 mins late. The officer called my spouse in for an interview first, about I-751.
How did you meet each other ?
How long have you known each other ?
Have you met your spouse's parents?
What does your spouse do for work ?
What are your spouse's interests?
What did the two of you do for dinner last night ?
What do you do for work ? (Business owner)
Who do you own your business with ? (With ex)
Do you all get along ?
Then, I was called inside and the officer asked me the following questions:
How long have you known each other ?
How did you meet each other ?
What visa did you come to US ?
When did you come to US ?
Have you traveled outside the country?
What do you do for work ?
Does your spouse own the business ?
Do you all get along ?
How many rooms do you have at the business ?
This all went so smoothly that I didn't even feel like I was being interviewed. The whole interview went like a good conversation...
At this point of the conversation the I-751 part was done and the officer said she will start the N-400 part. My spouse was told to wait outside.
N-400 questions for me:
Q1: What are two ways Americans can participate in their democracy?
Q2: Where is the Statue of Liberty?
Q3: What did the declaration of Independence do ?
Q4: What is one right only for US citizens?
Q5: How many senators are there ?
Speaking:
What do we pay to the government?
Writing:
We pay taxes to the government
Afterwards she asked those general questions from the N400 application like: Have you ever been convicted of a crime and blah blah...
After that I was told to wait outside as the officer enters data into the system and also to check if someone is available to do my Oath Ceremony.
After 5-10 mins I was called into another big room, like a conference room where they usually do Oath Ceremony in Large groups, my spouse came along with me. We were the only two in that room. I was giving my Naturalization Certificate. After a couple mins the oath ceremony was done and we left the building.
It was very nice of them to arrange the Oath ceremony for me on request since I have a trip scheduled soon so I need to apply for my US passport ASAP to get it on time.
I myself was nervous at first but trust me there is no need to be nervous, you have done all the difficult parts of the immigration journey. They can't just deny you. There has to be an obvious red flag to deny you. This is the last step, it will go more smoothly than you think. Enjoy the process, You are becoming a US citizen...