I was contacted by a recruiter on LinkedIn, first we had a call so they get to know me, then I sent my resume and my phone number and we scheduled a phone technical interview with one of facebook engineers, i asked for two weeks to prepare myself. Recruiter sent me preparation material, including videos , posts, and some tips They want you to be at your best, and they want you to know what to expect so you can be ready with no surprises, also you can contact them in case you have any question. when the day of the interview arrived i wasn't completely ready and i got really really nervious. for some reason i couldn't receive the call on my cell phone so i got it on my home phone, with de phone between my ear and shoulder. i live in mexico so i'm not really used to speak english a lot, the first 3 minutes i was catching the conversation like 2 or 3 seconds later, but it's ok for you to ask your interviewer to slow down a little . if it's not your first language it could be useful to start speaking english around 10 minutes before your interview So the interview began straight to the technical questions, i leave the questions in the questions section, we shared a web editor named code pad, you can choose whatever language you code best in. in the first question i had some mistakes and then i realized it was incomplete, actually i came with a good solution for both questions some minutes after the interview was already over. if you are really used to some IDE that points out when you are not using some variable or have a syntax error it could be useful to use a simple notepad a few days before. the second question was easier than the first one but i failed to come up with a good solution in terms of time complexity we discuss each solution as i was coding, my interviewer pointed me a couple of cases i wasn't expecting, after the first question i knew i didn't make it because i was performing poorly. then in the final part I could ask a couple of questions to my interviewer , so i had an insight on how is a common day working for facebook, and i really liked what i heard, it seems to be a great company to work for. they gave me feedback by email the very same day of the interview