Why do you want to go to the U.S.? What is your purpose of travel?

How long will you stay, and who’s funding your trip? questions like this

Questions can be asked: What ties do you have to your home country?

What do you plan to do after your program/visit ends?

Well, distance like reasons for travel, ties to home country, financial support, job or school details, and past travel history. Honesty and clear answers are key.