I applied through university. The process took 4 weeks. I interviewed at Northwestern Mutual
Interview
Had two on site interviews which were fairly simple. They gave a short assignment to be completed before returning a couple weeks later for a follow up interview. They assignment was easy and basically busy work. As long as you dress professional and have decent grades you should be all set.
Interview questions [1]
Question 1
None were overly difficult. They want to hire as many interns as possible.