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Updated weekly · Last refresh Oct 17

United Airlines Data Scientist Interview Questions

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

40questions
~6htotal time
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1
SQL & Data ManipulationStart here. 7 questions + 1 drill · ~70 min
Second Highest Trader SalaryEasy
Practice

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingUnited Airlines
Window Functions for Top RoutesMedium
Practice
Practice drill

Rank monthly flight routes by passenger volume and return the top three using aggregation and window functions.

Window FunctionsDate FunctionsRankingUnited Airlines
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2
Machine Learning7 questions · ~60 min
Bagging vs Boosting ExplainedMedium

Explain how bagging and boosting differ, and identify a representative algorithm for each ensemble method.

Ensemble Methodsmodel trainingSupervised LearningUnited Airlines
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3
Statistics & Probability5 questions · ~43 min
Statistics From Your ResumeMedium

Evaluates your ability to explain statistical results and methods used in your prior work.

statisticsresumeUnited Airlines
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4
Behavioral & Leadership12 questions · ~103 min
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5
More topics9 questions · ~77 min
Allocate Spare Aircraft Across AirportsHard

Assesses your system design and optimization thinking for operational resource allocation.

logisticsResource AllocationUnited Airlines
Simplex and Feasible Region SearchMedium

Tests understanding of linear programming optimization mechanics and feasibility.

best practicestechnical experiencequantitative problem solvingUnited Airlines
Metrics for Imbalanced Delay PredictionMedium

Tests metric selection under class imbalance and tradeoffs for operational prediction.

Evaluation TechniquesClassificationModel MetricsUnited Airlines
Product Metrics for Disruption AlertsMedium

Tests ability to translate product goals into measurable metrics and evaluation plans.

MetricsUser NeedsUse CasesUnited Airlines
Pandas Data Cleaning FunctionMedium

Tests practical data preprocessing skills for building reliable training datasets.

Data QualitytransformationsData WranglingUnited Airlines
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The finish line: interview-readyComplete all 40 questions plus 1 hands-on drill to finish this plan.