Bloomberg Software Developer interview questions

After submitting my applications, I had an invitation for phone screen interview with one of the software engineer in Bloomberg. The phone interview was not too hard. They asked a lot of c++ basic, such as what are the difference between array and pointer, stack and heap in memory, and static variable. For the coding part, I was asked to implement a function to get the Fibonacci sequence. After the phone screen interview, they invited me to the face-to-face interview. The questions was not too hard. Some basic c++ stuffs and algorithm. However, I did not perform well when I had the face-to-face interview.