Meta Sr. Software Engineer interview questions

Applied over linkedin. Got a call scheduled over "Bluejeans". Had a Chat hangout video call and coding over coderpad(execution disabled). Interview was schedule for london location and timing was set as per my local time zone. Really helpful.

Recruiter reached out - was not a direct post application. Recruiting team was very organized from day 1 to the end of the process. How will the process be, helper materials, even a webinar session to clarify any questions, what will be the next step and person I'll be in touch, etc. Accommodation was great. Very convenient stay and (again) very organized welcome next morning. 2 programming sessions - moderate level. 1 behavioral session - very good communication and chat for 45 minutes. lunch break with another engineer. 2 design sessions - moderate level. All the interviewers were so helpful except the one engineering lead in one of the design sessions. Actually that only session caused the interview to fail since instead of getting whole design approach and maturity, interviewer concentrated on solving hash logic :( Design sessions are very important to observe many dimensions about a candidate. And, since we stuck on a basic/very detail part of it, he'll not be able to observe other topics in such a broad area.