Meta Software Engineer interview questions

Lots of phone interviews with algorithmic problems. Didn't get any cultural fit questions.. They're all done by engineers with minimal interview training, so be prepared to get an extremely unprofessional interviewer (which happened to me once out of 4 interviews).

The first interview is an easy programming question where mostly everyone can pass to the next round. The second interview was a little bit harder using recursion to generate all possible words doing DFS backtracking. The interviewers are not very friendly.