Process took two weeks (not counting OA to VA). I interviewed at TikTok (Bytedance)
OA screen is on the difficult side as expected, 1 easy, 2 med, and 2 hards. I was invited to Virtual Onsite after a couple months.
Interview questions [1]
Question 1
Two months or so after the OA, I got invited to interview. I was asked a standard LC medium on String parsing in the first round.
Second round was rather unique; I was asked an LC medium to parse user data, and a follow-up consisted of optimizing the solution through parallel computing and external algorithms.
Third round was with Hiring Manager, and I was asked a statistical problem (ML related), which caught me off guard for a few seconds.
Phone screen where the recruiter asked questions about my background, why I'm interested in TikTok etc. Also asked a question about a technical project I've worked on in a team.
There was an OA and then 2 rounds of interviews afterwards. 1st round was technical with LC med and basic CS concepts, 2nd round was behavioral questions with hiring manager.
TikTok’s interview process usually starts with an application and recruiter screen, followed by an assessment or technical test, several interviews with team members and hiring managers, and a final decision or offer. The exact number of rounds depends on the role, location, and whether it is technical or non-technical.