I applied through an employee referral. The process took 2 weeks. I interviewed at Meta (Menlo Park, CA) in Mar 2019
Interview
Initial phone screen with prospective boss. Two coding interviews on coderpad. First chatted about research for most of the call and didn't get much time to code, second spend the entire time on a coding exercise. The question in the second was a CS algorithm question, rather than anything related to statistics or coding per se -- it could have been done in pseudocode. The process seems to be designed to weed-out people without formal CS training, though I didn't get the impression that writing low-level code was an important aspect of the job. If you really want to work at facebook core data science, you should probably study algorithms so that you'll have seen what they're going to come at you with before they do.
Interview questions [1]
Question 1
Given an array of integer intervals (from a_i to b_i), determine the value of x such that x is within the maximum number of intervals.
I applied online. The process took 2 months. I interviewed at Meta
Interview
7 Interviews, didn't receive an offer after the final round. Time-consuming process, which includes multiple rounds of technical interviews (design, coding, behavior, etc.) and a 1-hour research talk. The team leader was unpleasant to interact with.
recruiter call, technical interview, research interview, and job talk (presentation), hiring manager interview, everything was organized in the website so it was easy to navigate through the process, and recruiter was always responding super quickly