I had five rounds of interviews in total.

Screening Round: Two back-to-back interviews on the same day, asking two coding questions each.

• The first interview was not so good. I went with the right approach but could not solve the problem completely.
• I nailed the second interview. I was able to solve the first question (strings - Medium) in less than 15 minutes and also solved the second question (graphs - Hard) before the time was over.

Follow-up Round: One interview where they asked me two coding questions: the first (array with a binary search - Easy) and the second (trees - Medium).

Team-Matching Rounds: After I passed the coding rounds, I was informed by the recruiter that I would have to select 5 teams from the provided list of teams that work in ML at Facebook. Out of my top-5 selected teams, I would be interviewed with any two of them. I had two interviews with my 2nd and 3rd preferred teams, and luckily both of them liked me and wanted me in their teams. Finally, I selected my 2nd preferred team and accepted the offer.

From arrays, strings, graphs, binary search, trees.