Basic behavioral questions: Walk me through your resume. Give me an example of the time when you had to work in a difficult group-environment. Give me an example when you had to influence someone who was at first disinterested in your project/idea. Case question: How would you calculate the number of tenis balls sold in the US in 2009? Be yourself. Breathe. Pause before answering. Follow the STAR format of answering questions (Situation, Task, Action, Result). Citigroup Mortgage, division of Citigroup, is located in O'Fallon. Most people are loan-processors, and most people have worked in the company for a very long time. Company is very silo-ed and resistant to change.