Standard Facebook interview process.

I already had an offer from another big company and told the recruiter. He went about the process really fast.

• 1 phone interview
• 4 technical onsite interviews (3 coding and 1 system design)

Very school-like questions.

I could answer everything except the system design. I could not connect with the interviewer, which I feel is important for design questions, and he was not verbose enough to explain the basic requirements of the system.

1. Design a web crawler with a fixed set of resources.

2. Serialize/deserialize a graph.

3. Check if a tree is a mirror image (left and right are the same).