Question Bank

Machine Learning interview questions

Naming a model or a metric is only the start of an interview answer. Explain why it fits the task, and connect training, regularization, validation and evaluation to a concrete example. Start with your own explanation, then state its assumptions and limitations.

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MediumMachine Learning

What important aspects should be considered when developing ML system?

ml-systemsdevelopment-processbest-practices
Practice in bot
MediumMachine Learning

How to compare quality of different annotations and labeling?

annotation-qualitylabelingdata-quality
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MediumMachine Learning

How to tune number of leaves in trees to avoid overfitting?

tree-complexityoverfittinghyperparameter-tuning
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MediumMachine Learning

Advantages of simple models for forecasting and control?

simple-modelsinterpretabilityforecasting
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MediumMachine LearningАльфа-Банк

When to conduct A/B testing of ML models?

ab-testingmodel-deploymentvalidation
Practice in bot
MediumMachine Learning

How to model customer response to marketing offers?

customer-responsemarketing-analyticsuplift-modeling
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MediumMachine Learning

How can model account for differences between different product offerings?

product-modelingrecommendation-systemscustomer-analytics
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MediumMachine LearningАльфа-Банк

How to generally detect model overfitting?

overfittingmodel-validationregularization
Practice in bot
MediumMachine LearningАльфа-Банк

How to handle last two columns with problematic data?

data-preprocessingmissing-valuesdata-quality
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MediumMachine Learning

How to find anomalies in salary structure using ML?

anomaly-detectionhr-analyticsorganizational-analysis
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MediumMachine Learning

How to interpret 24-point drop in model metrics?

metric-degradationperformance-analysistroubleshooting
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MediumMachine Learning

How to work with inherited ML solutions from previous teams?

legacy-systemsknowledge-transfersystem-migration
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MediumMachine Learning

What is Gini coefficient in credit scoring context?

gini-coefficientcredit-scoringmodel-evaluation
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MediumMachine Learning

What types of histograms are useful for ML data analysis?

histogramsdata-visualizationdata-analysis
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MediumMachine Learning

Why can Gini coefficient be inverted when calculated through AUC?

gini-coefficientmetric-validationlabel-encoding
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MediumMachine Learning

Alternatives to median imputation for missing values in ML?

missing-valuesimputationdata-preprocessing
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MediumMachine LearningАльянс Кредит

How to handle fraud features that exist only for suspicious customers?

fraud-detectionsparse-featuresselection-bias
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MediumMachine LearningАльянс Кредит

What minimum metric change is considered significant in ML?

statistical-significanceeffect-sizemetric-validation
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MediumMachine LearningАльянс Кредит

How many positive and negative examples needed for model training?

sample-sizeclass-balancetraining-data
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MediumMachine LearningАльянс Кредит

How to understand that there's too little data to build reliable model?

data-sufficiencysample-sizemodel-reliability
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