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The recruiter was friendly, and my interviewer was very nice. The interview took place at the Facebook office in New York. The first question wasn't that hard. The second-round interview was difficult but not impossible.

It's a whole lot of studying and planning until they think you are ready to meet a jr. engineer. Then, if you pass that, it's on to a grilling by multiple engineers in an 6-hour remote session.

It was the TPS stage - standard LC questions. Recommended brushing up on it and practicing a couple. The next round is the onsite. That one has a system design.