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Updated weekly · Last refresh Aug 30

The Cigna Group AI Engineer Interview Questions

The questions to prepare for a The Cigna Group AI Engineer interview. Questions from real interview reports rank first. Updated weekly.

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1
Machine LearningStart here. 7 questions · ~58 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffThe Cigna Group
Reducing Overfitting in ML ModelsMedium

Explain how to diagnose and reduce overfitting using regularization, cross-validation, and model selection.

Cross-ValidationBias-Variance TradeoffRegularizationThe Cigna Group
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2
Pipelines5 questions · ~41 min
Data Quality in ML PipelinesMedium

Practical approach for maintaining data quality across ML ETL pipelines, orchestration, and repeatable data processing.

Data QualityETLData ModelingThe Cigna Group
Real-Time Dashboard Data PipelineMedium

Design a streaming pipeline that keeps dashboard data fresh and accurate for operational reporting.

InfrastructureStream ProcessingOrchestrationThe Cigna Group
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3
Model Evaluation3 questions · ~25 min
Choosing Core Model MetricsEasy

Explain which model evaluation metrics to use and how metric choice depends on the task and error costs.

PrecisionAccuracyRecallThe Cigna Group
Measuring AI Project SuccessMedium

Tests ability to define outcomes, metrics, and validation plans for healthcare AI projects.

PrecisionAccuracyRecallThe Cigna Group
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4
More topics2 questions · ~16 min
Time Complexity of Sorting AlgorithmsEasy

Compare common sorting algorithms by best, average, and worst-case time complexity and explain when each is appropriate.

MathArraysSortingThe Cigna Group
Data Manipulation Coding ChallengeMedium

Tests practical coding skills for transforming and analyzing data used in AI systems.

Hash TablesArraysMatrixThe Cigna Group
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