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Updated weekly · Last refresh Aug 30

Fannie Mae Data Scientist Interview Questions

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

50questions
~7htotal time
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1
Model EvaluationStart here. 11 questions · ~88 min
Assessing Model OverfittingMedium

Explain how to determine whether a model is overfitting, using validation performance and generalization checks.

Cross-ValidationBias-Variance TradeoffAccuracyFannie Mae
Best Practices for Model EvaluationMedium

Explain the best practices for evaluating a model and choosing metrics that match the task.

PrecisionAccuracyRecallFannie Mae
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2
Machine Learning16 questions · ~128 min
Preprocessing Data for Model TrainingEasy

Explain a practical preprocessing pipeline for supervised learning, from data cleaning and encoding to validation-ready features.

Hyperparameter TuningCross-ValidationFeature EngineeringFannie Mae
Regression vs Classification BasicsEasy

Explain how regression and classification differ, including target type, outputs, and how you evaluate each.

Feature EngineeringSupervised LearningFannie Mae
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3
System Design3 questions · ~24 min
Anomaly Detection at ScaleHard

Assesses ability to design scalable anomaly detection approaches for high-volume transaction data.

scalable architectureanomaly detectiondata streamsFannie Mae
Anomaly Detection Solution StructureHard

Evaluates system design thinking for anomaly detection pipelines at transaction scale.

scalable architectureanomaly detectiondata streamsFannie Mae
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4
Behavioral & Leadership17 questions · ~136 min
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5
More topics3 questions · ~24 min
Significance Testing MethodsMedium

Assesses statistical reasoning for distinguishing signal from noise.

Hypothesis TestingStatistical SignificanceP-ValuesFannie Mae
Market Recovery Post-CrisisHard

Assesses product and analytical reasoning about macroeconomic recovery relevant to housing finance.

market analysisFannie Mae
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