There are several different types of questions that are asked during a US immigrant visa interview. You must obtain an immigrant visa from the US government if you have to visit the United States of America for an extended period of time. Once you fill out the necessary forms and submit an application in this regard, you are called for an interview in the immigration office. It is a crucial part of the process. The officers will ask you a wide array of questions. Whether your application is approved or rejected depends very much on how you answer to their questions. Your answers are reviewed thoroughly in order to get a better idea whether it can be safe to allow you to enter the country. In theory, you may not find anything wrong about this interview, not something you should worry about. But, in practical, it often turns out to be a nerve-wracking experience.