Facebook did a phone interview after a coding test. At first they wanted me to solve one of their quiz problems before doing the coding test. Since I was busy they decided to just do the coding test. While I presumably passed the coding test, Age Discrimination appears rampant over at Facebook. You got phone interview questions such as "We work hard so how many hours do you typically put on the job?". I don't think it matter how you answered that question because I suspect they are looking for people to work 168 hours a week.