Voicebox Technologies interview questions

One of the most difficult and unpleasant experiences. First a phone interview, then a long written coding test, which I did very well. The CEO went over the paper with me once I was done and was very pleased. After this a whole bunch of interviews in person. I admit I screwed up bigtime on some of them, hadn't had enough sleep, I guess. But the first interview was miserable. There was this speech scientist guy who was literally laughing on my face as I tried to think through a problem. The day ended with the last set of interviewers being semi-drunk because it was a Friday and they'd just had an unwinder. Questions ranged from Fibonacci number generation and optimization to other algorithm problems using has tables for optimization, to regex interpretation to Backtracking concept in algorithms and dynamic programming.