I applied online. I interviewed at TikTok (San Francisco, CA) in Dec 2020
Interview
4 Hackerrank problem set. I never went past this step. One frequency array problem, one statistics and probability, one binary search problem, and an ad hoc problem ( I guess )
Interview questions [1]
Question 1
1-Easy frequency array problem ( standard ).
2-Probability of killing a monster who has H health points with K swing such that each swing has an evenly distributed value between [0, M]
3- You have 2 memory slots, print after how many steps you go out of memory or OOM. step 1 takes 1 memory slot, step 2 takes 2 memory slots, and so on. You should decrease from the biggest of the 2 slots or decrease from the first if they're equal
0 8 11
1 8 10
2 8 8
3 5 8
4 5 4
5 0 4
6 OOM
print out 6 steps and also print out the last form of the 2 memory slots.
4- Minimum character transformation ( You can find it on chegg).
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.
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