If you get the opportunity to interview at Facebook, take it. Not because you're likely to get the job, but because it's the best practice out there and will reveal where you're weak in your methodologies. Keep in mind that Facebook is a massive tech company, so being selected to conduct an interview is a lot like being selected for jury duty. It's likely you'll could get someone who isn't motivated to be interviewing you and that's fine. Try to take from the experience what you can. My interview, like most others, consisted of two remote video sessions covering my product and execution sense. The product sense interview was focused around my methodology for approaching a problem, identifying a target user group, exploring a problem space, thinking up creative solutions, prioritizing my work for impact, and setting the right goals. The execution interview was focused around identifying the right metrics for determining success, and using them to move forward in the right direction. Facebook does a good job at trying to prep you on how to prepare, though you'll need to keep in mind that you'll be working through these methodologies in the context of a specific scenario and will likely be constantly interrupted by the interviewer's questions. I never heard back from them after the remote video sessions.