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Prep plan

Updated weekly · Last refresh Nov 11

TikTok Shop Data Scientist Interview Questions

The questions to prepare for a TikTok Shop Data Scientist interview. Questions from real interview reports rank first. Updated daily.

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SQL & Data ManipulationStart here. 8 questions + 1 drill · ~79 min

Calculate 30-Day User RetentionHard

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Recently asked

Use CTEs, joins, and date filtering to calculate 30-day retention by signup cohort from login and feature usage data.

Window FunctionsDate FunctionsAggregations

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7-Day Rolling Active UsersMedium

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Recently asked

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.

Window FunctionsDate FunctionsRunning Totals

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Seller Monthly GMV Ranking and GrowthHard

Practice

Practice drill

Calculate monthly TikTok Shop seller GMV, growth, ranking, and cumulative performance from order data.

Joinssql queriescomplex queries

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Machine Learning6 questions · ~52 min

Cross-Entropy vs MSE GradientsMedium

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Compare Cross-Entropy and MSE mathematically, then explain how each changes gradient behavior during model training.

loss functionsmodel trainingGradient Descent

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Metrics5 questions · ~43 min

Define Success Metrics for FeaturesMedium

Recently asked

Set a clear north star, supporting KPIs, leading indicators, and guardrails for a new product feature.

North Star MetricLagging IndicatorsKPIs

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First Checks for Metric DropsEasy

Recently asked

Outline the first checks to diagnose a sudden drop in a core product metric, starting with data quality, scope, and decomposition.

Lagging IndicatorsLeading IndicatorsDiagnosis

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A/B Testing & Experimentation8 questions · ~69 min

Common Pitfalls in Experiment ResultsHard

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Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio Mismatch

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Product Sense3 questions · ~26 min

Measure AI Answer UsefulnessMedium

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Assesses metric design for evaluating user value of AI-generated product features.

product metricsuser experienceuser feedback

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Behavioral & Leadership10 questions · ~86 min

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