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Prep plan
Updated weekly · Last refresh Oct 17

Poshmark Data Scientist Interview Questions

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

50questions
~7htotal time
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1
SQL & Data ManipulationStart here. 10 questions · ~89 min
2
A/B Testing & Experimentation5 questions · ~44 min
Detect Interference in Ops ExperimentHard

Assess whether interference between nearby units could bias an operations experiment and how to test for it.

Network InterferenceExperimentationCausal InferencePoshmark
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3
Metrics10 questions · ~89 min
Choose Metrics for New FeaturesEasy

Define a practical framework for selecting a north star, supporting KPIs, and leading indicators for a new product feature.

North Star MetricKPIsLeading IndicatorsPoshmark
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4
Statistics & Probability9 questions · ~80 min
Interpreting Significance in ExperimentsMedium

Explain statistical significance in experiments and how p-values and confidence intervals guide interpretation.

Confidence IntervalsStatistical SignificanceP-ValuesPoshmark
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5
Product Sense9 questions · ~80 min
Define Metrics for New FeaturesMedium

Define a success metric for a new feature that captures real user value, not just raw usage.

MetricsFeature Prioritizationuser valuePoshmark
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6
Machine Learning3 questions · ~27 min
Train-Test Split Sampling for ImbalanceMedium

Evaluates your knowledge of handling class imbalance during dataset splitting.

SamplingPoshmark
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7
More topics4 questions · ~36 min
Evaluate Recommendation PerformanceMedium

Tests your ability to choose offline and online evaluation metrics for feed recommendations.

PrecisionAccuracyRecallPoshmark
Executive Dashboards for Marketplace HealthHard

Tests ability to design durable KPI dashboards, define ownership, and ensure data reliability for executives.

ToolsData ModelingQualityPoshmark
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