Meta Senior Software Engineer interview questions

Interviewer was over 10 minutes late, was not able to effectively communicate, and because he wanted to end on schedule despite being very late I didn't have time to finish the technical question I was given (a trie based question that would've been doable with slightly more time).

After having been approached by a head hunter I was invited to a screening coding interview. After passing the screening interview I was called by an HR ascreend was told the entire process. This phone call took almost an hour. I was invited to four interviews: 1. Coding interview 1 2. Coding interview 2 3. Domain specific interview (I was interviewing for a specialist) 4. Personality interview 2. Followup with personality + coding interviews + domain specific interview