They do not ask your typical questions. They really like to see what you interests are with your career and how they can accomplish company goals as well as personal employee goals. Seem to like well rounded engineers - HR is extremely in touch with the employee base. You can tell she is very invested in the success of the employees as well as the company. The history of the company is very intresting. They like to see your thought process on problem solving. That will be a main subject.