Between all of the different positions at Credit Suisse, why do you want to do Investment Banking?
This is another way to ask, tell me why you are a good fit for investment banking and that you just didn't apply blindly. Know what the characteristics are of an investment banker. You should be able to focus on a project for an extended period of time and see it through from beginning to end. Be able to handle long hours. This is in contrast to a sales and trading position, which is more fast-paced, market oriented job. Both jobs require team work and that is important to mention. Also, know that each deal with, such as Primary issuance and M&A activity vs sales and trading which does secondary market transactions. Why does one interest you over the other?