What questions are asked in a US tourist visa interview?

Some of the top 5 frequently asked questions in a US tourist visa interview are as follows:

1. What is your purpose for traveling to the US?
2. How long do you plan on staying in the US?
3. Why are you traveling to the US at this specific time?
4. Where do you plan on staying in the US (With family or friends, at a hotel, etc.)
5. Have you visited the US before?