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Updated weekly · Last refresh Sep 25

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.

43questions
~6htotal time
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1
SQL & Data ManipulationStart here. 8 questions + 1 drill · ~79 min
Calculate 30-Day User RetentionHard
Practice
Recently asked

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

Window FunctionsDate FunctionsAggregationsTikTok Shop
7-Day Rolling Active UsersMedium
Practice
Recently asked

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

Window FunctionsDate FunctionsRunning TotalsTikTok Shop
Your Data ProjectMedium
Practice
Recently asked
Practice drill

Use joins, aggregation, and a CTE to identify TikTok Shop sellers with at least two completed orders.

experienceJoinsData ManipulationTikTok ShopTikTok
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2
Machine Learning7 questions · ~61 min
Cross-Entropy vs MSE GradientsMedium
Recently asked

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

loss functionsmodel trainingGradient DescentTikTok Shop
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3
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 IndicatorsKPIsTikTok Shop
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 IndicatorsDiagnosisTikTok Shop
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4
A/B Testing & Experimentation8 questions · ~69 min
Common Pitfalls in Experiment ResultsHard
Recently asked

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

PeekingNovelty EffectSample Ratio MismatchTikTok Shop
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5
Product Sense3 questions · ~26 min
Measure AI Answer UsefulnessMedium
Recently asked

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

product metricsuser experienceuser feedbackTikTok Shop
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6
Behavioral & Leadership10 questions · ~87 min
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7
More topics2 questions · ~17 min
Statistical Significance in Hypothesis TestingEasy
Recently asked

Explain what statistical significance means and why it matters when interpreting experimental or analytical results.

Hypothesis TestingData AnalysisStatistical SignificanceTikTok Shop
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The finish line: interview-readyComplete all 43 questions plus 1 hands-on drill to finish this plan.