You can mentally prepare your answers, and you may even find it helpful to write down your responses, a process that helps you to thoughtfully organize them and compose them in an articulate fashion.
Many collections are available on the Web.
Boasts a huge selection. Interview Network's Interview Question Bank Subject and Keyword Index . Because this one is broken down by subject, you can find interview questions appropriate to your field. The Harvard Office of Career Services' Interview Section has Frequently Asked Questions, along with a great section on preparing for the case questions often asked by consulting firms. Part I and Part II .