X Software Engineer Intern interview questions

I was referred internally, and a recruiter got back to me within 24 hours. The first step was two autograded coding challenges on Codility, 1 hour total, which was pretty easy (question difficulty was equivalent to their demo test). Just be careful because the autograder can be very picky. After that, I got a 45 minute phone screen and three "on-site" back-to-back 45 minute interviews through Skype. The interviews weren't too bad, but the difficulty of your questions really depends on your interviewer. I did fine on interviews #1 and #3, but completely flubbed up on interview #2. After my last round of interviews on Wednesday afternoon, I received a rejection from Twitter Friday morning. Good luck to anyone else trying at Twitter!