TikTok Senior Data Scientist Interview Experience — Three Rounds, Rejected After the Hiring Manager Round

TikTok·Data Scientist·Oct 2025
OnsiteSenior+Rejectedhard

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Published

Curated and edited by PracHub

Practice the questions from this interview

Compute 7-day rolling complaint/order ratio in SQL
Explain and tune XGBoost; prevent overfitting
Decide launch of downranking suspected bad sellers
Causally measure traffic reduction effectiveness
Detect and suppress bad sellers robustly
Communicate technical impact under skeptical stakeholders

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