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Susquehanna International Group Data Scientist Interview Questions

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

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1
Statistics & ProbabilityStart here. 12 questions · ~101 min
Expected Flips for Two HeadsMedium

Compute the expected waiting time to see two consecutive heads when flipping a fair coin.

DistributionsExpected ValueConditional ProbabilitySusquehanna International Group
Guaranteed Matching Pair in SocksEasy

Use worst-case reasoning to find the minimum number of sock draws needed to guarantee a matching pair.

combinatoricsExpected ValueConditional ProbabilitySusquehanna International Group
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2
Behavioral & Leadership7 questions · ~59 min
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3
More topics8 questions · ~68 min
Pitfalls in Streaming Experiment AnalysisHard

Identify major online experiment pitfalls and explain how they can bias results in a streaming product A/B test.

Network InterferenceNovelty EffectSample Ratio MismatchSusquehanna International Group
First Checks for Metric DropsEasy

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

Lagging IndicatorsLeading IndicatorsDiagnosisSusquehanna International Group
Estimate Transformation Matrix from GridHard

Tests geometric modeling and linear algebra skills for recovering transformations from structured patterns.

Unsupervised LearningFeature Engineeringmodel trainingSusquehanna International Group
Window Functions for Rolling MetricsMedium

Tests SQL proficiency with window functions for grouped rolling computations.

Window FunctionsRankingRunning TotalsSusquehanna International Group
A/B Test for Trading WorkflowMedium

Design an experiment for a new trading signal or workflow change, including metrics, power, randomization, and launch criteria.

experiment designGuardrail Metricsprimary metricsSusquehanna International Group
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 IndicatorsSusquehanna International Group
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
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