Meta Developer interview questions

This was the first round phone interview. I was asked two questions: 1. Please write a program to merge two sorted array. 2. Each key on the telephone represents a list of characters. Given a telephone number, please list all the possible strings it represents. I was asked to write exact code on an online document.

Had an initial phone interview with the recruiter. That was followed by two technical phone interviews. First technical interview went really well. The dude was really professional. The second interviewer had an accent that was difficult to understand but other than that, it was a good interview. I feel Facebook interview process is weird, in spite of doing well you may get rejected.