I applied through an employee referral. I interviewed at Meta in Dec 2021
Interview
It was two rounds of coding interview. Then HR called and told me I got offer. Overall pretty easy. No behavioral stuff, all leetcode questions. The interview process was pretty standard, I think they had a lot of interns that year and no skillset aside from basic data structures was required.
online coding assessment (didn't matter too much) technical interview (2 coding q 45 min) technical interview (2 coding 2 45 min) The interviewers were nice and helped me along as I got stuck.
Interview questions [1]
Question 1
add 2 numbers valid parentheses: given string correct so that no extra open or close parens
PhD MLE interview for 2 rounds of 45min VO, and three team match opportunities with team managers. Total last around 2 months. The coding problems were medium level on leetcode.