I applied through college or university. I interviewed at Meta
Interview
Facebook came to my school to conduct on-campus interviews for prospective interns. I was placed in the room with one of the engineers, where he asked me why I wanted to work for Facebook, gave me two technical programming questions, and allocated 5 minutes at the end to ask about his work and any questions I might have about the company.
Interview questions [1]
Question 1
Write a function that returns the square root of a number (obviously without using any sort of built-in square root function).
I applied through an employee referral. I interviewed at Meta
Interview
I was invited to take their OA about a week after applying, mostly consisted of leetcode easy and mediums. It was a pretty smooth process, with quick feedback. Good experience overall
Interview questions [1]
Question 1
Data structures and algorithms, leetcode style medium and easy
They ask the normal standard DSA questions that you would expect for an internship like LeetCode mediums. I think there were two rounds of technical interviews before the offer stage.
DS&A questions, interview is just that with only a couple mins of non technical. Need to be quick and fluent in standard leetcode easy-med, and have decent enough grasp to come up with good ideas to approach leetcode hards.
Interview questions [1]
Question 1
DS&A. Asked about how to merge 3 ordered array into ordered array. Then, how to generalise for k ordered arrays. Was okay, but need to be faster and have solution down as if you can do it in your sleep.