Meta Developer interview questions

I solved a challenged at interviewstreet.com 2 weeks after they emailed me asking to send my CV along with some answers, for example: preferred programming languages, current job, time constrains, availabity for interview... Another email telling me about how to get prepared for the interview (visiting glassdor.com). After I replied, 1 week later we coordinated the skype interview. The interview was kind and explained to me any doubt I had. They called me explaining the good and bad things I did on my first phone screener, and then we planned a second interview. I was able to solve the second problem but probably I took more time than expected and had some bugs that the interviewer helped me to find out. The day after the second interview I was said "thanks" by Facebook, that my background didn't fit any current position.