Meta Software Engineer Infrastructure interview questions

Ok - but coming from finance, was unprepared for geolocation algorithm questions. Hand waving with "select a data structure to efficiently look up coordinates" was not enough as the interviewer wanted me to come up with something specific.

round 1: 45 mins phone screen(2 coding questions) round2: Virtual onsite interview(4 rounds) first round: High level design second round : Behavioral (Leadership, Disagree, Team collaboration ) third round: coding 45 mins(2 questions) fourth round: coding 45 mins(2 questions)