Bloomberg Intern interview questions

Two senior engineers interviewed me. One person first looked through my resume and asked some questions about it. Then he gave me a binary tree problem which I spent most of the time solving it. The other person didn't speak totally. After I finished the problem they answered my questions.

First round - phone interview with the HR department. They replied for a phone interview within minutes of my online application, and arranged for a phone interview two days later. However, she didn't call at our arranged timing, neither did she give advance notice. Later on she contacted me and we arranged for a new timing. The interview was short and quick.