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Updated weekly · Last refresh Aug 30

Appzen Data Scientist Interview Questions

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

50questions
~7htotal time
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1
NLPStart here. 14 questions · ~112 min
Parse Poorly Scanned Receipt FieldsMedium

Build a receipt information extraction pipeline using OCR-aware NER and post-processing to recover key fields from noisy scanned receipts.

Language ModelsNamed Entity RecognitionTokenizationAppzen
Extract Insights from Financial TextHard

Design a pipeline to extract entities, events, and actionable signals from noisy financial text.

Language ModelsText ClassificationNamed Entity RecognitionAppzen
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2
Model Evaluation7 questions · ~56 min
Interpret F1 for Imbalanced ClassificationEasy

Explain why F1 is more informative than accuracy for a fraud model with 97.2% accuracy but only 18% recall on a 1% positive class.

F1 ScorePrecisionRecallAppzen
Precision vs Recall TradeoffEasy

Explain the difference between precision and recall, and how each reflects a different type of classification error.

Evaluation TechniquesClassificationConfusion MatrixAppzen
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3
Machine Learning13 questions · ~104 min
Detect Card Fraud with Imbalanced DataEasy

Build an imbalanced binary classifier for card fraud detection using class weighting, resampling, and threshold tuning with PR-focused evaluation.

Hyperparameter TuningCross-ValidationFeature EngineeringAppzen
Hyperparameter Tuning for ML ModelsMedium

Explain a practical process for tuning model hyperparameters using cross-validation and overfitting checks.

Hyperparameter TuningCross-ValidationBias-Variance TradeoffAppzen
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4
Pipelines13 questions · ~104 min
Monitor a Production ML PipelineMedium

Design telemetry and monitoring for a production ML pipeline to catch latency, failures, and data quality issues early.

monitoringtelemetryQualityAppzen
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5
More topics3 questions · ~24 min
Draw Rectangle on Images TaskMedium

Assesses your ability to approach an image annotation or computer vision task under interview constraints.

Appzen
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The finish line: interview-readyComplete all 50 questions to finish this plan.