Generally speaking, the USCIS Adjudication Officer has discretion to ask a variety of questions and this is very much depends on the interviewer. Most of the questions however, will be related to your relationship with your spouse, your marriage life, daily activities and financial record. The USCIS Adjudication Officer may also check your facebook.com and my space profiles if you have one or use other web related sources in order to verify your relationships. A sample list of questions for Green Card Through Marriage interviews may be found at: www.DrImmigration.com.