I prepared my parents for the interview using random online questions I put together. Same questions were asked at the interview. Parents were interviewed together, most questions were directed at my Dad.
Dad's Questions:
Introduce yourself
How did your son go to America and the year
Where does your son work
Where does your son live
Tell me about his family(spouse name, kids and their ages)
Mom's Question:
Introduce yourself
Mom dropped her middle name via a sworn document in 2018, they asked if her current name (first & last name) is what she's always used after the change.
Note: At the minimum, your mom should know the following:
How you went to the US as well the the year.
Where you live in the states
Where you work
Your family life ( if married, spouse name. If you have kids, she should know their names and ages)
I went online and put together questions which I went through with them via zoom and regular calls for two months.
Evidence of relationship
We submitted receipts of monthly remittances to both parents for the past two years
Pictures taken in 2019 and pictures when I was 6 and 15 years.