Meta Software Developer interview questions

I couldn't even get to talk to the interviewer because of multiple communication issues. First, we schedule our first call and I receive a confirmation email with a date and time for my time zone. I also get a link to setup a profile on facebookrecruiting.com. On that website, I have steps to complete. One was to upload the latest version of my resume. The other was to select dates in the future so we can already schedule the second interview step. Not long after, I receive an email saying that my call was cancelled. I waited for another email saying when and if the call was rescheduled, which never came. So I sent an email to the recruiter asking why. He thought that I was the one that wanted to cancel since I updated my availability on the website. Which I did, but for the future steps of the interview, not for the first call. So he said he rescheduled for the next week without specifying the time. I figured it was going to be the same time as the first call. On that date, I waited an hour to get the call. I sent an email asking if the meeting was at the same time for my time zone. He answered yes. I then said the meeting was an hour ago and asked if by chance it was for his own time zone. He answered yes again even if he already confirmed previously it was in my own time zone. Finally, the time comes along and I never got the call. I went and asked to cancel the meeting and not to reschedule. Their final email said it was all due to a system error.

Applied online in Meta site. Got contacted by a university recruiter to schedule my first interview round i.e. phone screen. Got asked two questions (Easy & Medium). The dates were very flexible, was able to give myself at least 1 month to prepare.