Algorithmic Trading Intern

The first interview was on-campus. They were very friendly and willing to help. Had 2 technical coding questions that lasted ~30 minutes. Passed to the final round, where they flew me to Chicago. There, it was a superday consisting of 4 interviews. One was a purely coding interview with a laptop in front of me (C++). Another was purely mathematical/linear algebra done on the whiteboard. The third and fourth were pen/paper brainteaser and math/probability questions. Though I didn't get enough questions to receive an offer, they were very helpful and nice. There isn't really a way to game their system besides just knowing how to solve data structures, algorithms, and probability questions.