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I met a recruiter at the Facebook offices, and she showed me around. Because I was applying for an engineering position, the tour started on the engineering floor, which isn't too big. The offices were nice but nothing super special. She did mention

1 phone interview + 4 virtual onsite interviews in 2 days. 3 coding + 1 system design + 1 behavioral question. Coding is medium and easy level, and system design is seeking a lot of details.

This stage included 1-2 rounds of coding interviews, primarily on Data Structures & Algorithms (LeetCode Medium/Hard). The questions focused on: * Graphs * Trees * Dynamic programming * Arrays The interviewer was friendly and gave hints when neede