Meta Software Developer interview questions

Two Phone interviews with technical questions. I was referred by my friend working at Facebook. First, I had a phone interview with an engineer. The question was not harder than other companies' like Google. But He expected me to write completely a neat and bug-free code in less than 15min. After the 1st phone interview, I was told that I need to have another one in a week. The 2nd one was very similar to 1st one. Make sure to be prepared for writing a clean code fast.

I emailed a recruiter my resume stating that I would like to intern at Facebook over the Summer. I got a call back in about a week. She asked me "Why Facebook" and to describe one of my favorite projects. After about 15 minutes she said she would move me on to the next round of interviews.