The first interview was at my school with two representatives in Technology at Bloomberg. They were easy-going and asked only technical questions related to programming, algorithms, and data structures. The final question was code related and relatively easy. Response is fast at Bloomberg, and I received 2nd round interview approval 2 days later. There were 3 interviews: 1 HR, 2 technical. It was quite tough but luckily they don't expect you to get everything correct. Everyone was friendly but demanding. After the interview, I received an offer the very next business day. They work fast.

Required to take a test from Previsor (a Brainbench test), first choose C++ and the test consisted of probably 50% STL questions, which I was not comfortable with, so after doing awful on the C++ test I took the C test, which was much easier, mostly questions dealing with pointers, remember one on using bitwise operators to swap variables without a temp. I reccommend taking the C test unless you are very comfortable with STL/MI/namespaces/etc. All in all, I was rejected and spoke with a kid I know who got the internship last summer, the online test was not required for him so might not be necessary...