Top 38
Prep plan
Updated weekly · Last refresh Aug 30

Twitch Data Scientist Interview Questions

The questions to prepare for a Twitch Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

38questions
~6htotal time
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1
SQL & Data ManipulationStart here. 6 questions · ~56 min
Top Chatters Message FrequencyMedium
Practice

Rank Twitch chatters per channel and calculate message frequency using joins, aggregation, and ROW_NUMBER().

sqlAggregationsTwitch
Retention Cohorts With Complex JoinsHard
Practice

Build twelve-month Twitch viewer retention cohorts with CTEs, joins, date offsets, and conditional aggregation.

JoinssqlCohort AnalysisTwitch
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2
A/B Testing & Experimentation9 questions · ~83 min
Design and Reflect on A/B TestMedium

Describe an A/B test you ran, what question it answered, how you measured success, and what you learned from the results.

ExperimentationGuardrail MetricsA/B TestingTwitch
Diagnose Sample Ratio MismatchHard

Investigate sample ratio mismatch and decide whether an experiment readout is trustworthy enough to ship.

Guardrail MetricsSample Ratio MismatchA/B TestingTwitch
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3
Metrics3 questions · ~28 min
Diagnose Client Engagement DropMedium

Diagnose a sharp decline in client engagement and break it down into cohorts, funnel steps, and likely business drivers.

Leading IndicatorsDiagnosisEngagement MetricsTwitch
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4
Product Sense5 questions · ~46 min
First Change to TwitchMedium

Assesses product sense and data-driven prioritization for improving Twitch's user experience.

innovationproduct improvementTwitch
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5
Statistics & Probability6 questions · ~56 min
Non-Parametric vs T-Tests in User AnalyticsMedium

Tests statistical method selection for Twitch user analytics with distributional assumptions.

Twitch
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6
Behavioral & Leadership7 questions · ~65 min
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7
More topics2 questions · ~19 min
Build a Customer Churn ModelHard

Build a churn prediction model for a subscription wellness business using behavioral, billing, and engagement data.

Cross-ValidationFeature EngineeringSupervised LearningTwitch
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