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Updated weekly · Last refresh Oct 17

Evans & Chambers Technology Data Scientist Interview Questions

The questions to prepare for a Evans & Chambers Technology Data Scientist interview. Questions from real interview reports rank first. Updated daily.

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1
SQL & Data ManipulationStart here. 3 questions + 1 drill · ~37 min
Analyze Customer Purchase Trends with Window FunctionsEasy
Practice

Calculate the monthly spending trends for customers using window functions and joins.

Evans & Chambers Technology
7-Day Rolling Active UsersMedium
Practice

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

Window FunctionsDate FunctionsRunning TotalsEvans & Chambers Technology
SQL Window Trends in TelemetryMedium
Practice
Practice drill

Compare daily, weekly, and seven-day rolling autonomous vehicle mileage using PostgreSQL window functions.

Window FunctionsDate FunctionsJoinsMay Mobility
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2
A/B Testing & Experimentation4 questions · ~36 min
Mobile Flag Rollout Experiment AnalysisMedium

Design and analyze a mobile feature-flag rollout with a pre-registered primary metric, guardrails, and a clear ship rule.

Rollback PlanExperimentationGuardrail MetricsEvans & Chambers Technology
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3
Machine Learning5 questions · ~45 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 LearningEvans & Chambers Technology
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4
Product Sense4 questions · ~36 min
Prioritize MVP vs Later FeaturesMedium

Decide which features belong in an initial launch versus a later phase.

Feature PrioritizationMVPProduct VisionEvans & Chambers Technology
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5
Behavioral & Leadership7 questions · ~63 min
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6
More topics4 questions · ~36 min
Model Performance EvaluationHard

Explain how to select metrics, validate predictions, and analyze errors when evaluating a machine learning model.

model performanceevaluation metricsPrecisionEvans & Chambers Technology
Diagnose a Metric Drop After LaunchMedium

Investigate why a key KPI moved the wrong way after a product change and separate signal from noise.

Lagging IndicatorsLeading IndicatorsDiagnosisEvans & Chambers Technology
Choosing a Statistical Significance TestHard

Select the appropriate statistical test for an observed change and explain how its p-value determines significance.

Hypothesis TestingStatistical SignificanceP-ValuesEvans & Chambers Technology
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The finish line: interview-readyComplete all 27 questions plus 1 hands-on drill to finish this plan.