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Updated weekly · Last refresh Sep 13

Top 50 Machine Learning Interview Questions

The most frequently asked Machine Learning questions across all roles and companies, ranked by real interview frequency. Updated daily.

50questions
~8htotal time
102companies covered
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1
CodingStart here. 6 questions · ~55 min
L2-Regularized Logistic Regression SolverMedium
Practice

Implement batch gradient descent for L2-regularized logistic regression and return the learned weights and bias.

MathMachine LearningfunctionsWaymo
Build ML Algorithm From ScratchHard
Practice

Implement multiclass softmax regression from scratch using stable probabilities, batch gradient descent, and L2 regularization.

CodingMachine LearningMemorial Sloan Kettering Cancer Center
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2
NLP7 questions · ~64 min
Engineer Features for Text ClassificationMedium

Design feature engineering for a text classifier, from tokenization and TF-IDF to embeddings and model selection.

Text ClassificationFeature EngineeringNLPZoomInfoSnap
Fine-Tuning an Open-Source LLMHard

Design and implement a safe LoRA fine-tuning pipeline for an open-source LLM supporting GEICO customer service.

Language ModelsText ClassificationMachine LearningGEICO
Transformer Architecture ExplanationHard
Recently asked

Explain self-attention and adapt transformer components from language modeling to image classification with Vision Transformers.

Language ModelsMachine LearningTokenizationApple
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3
Pipelines7 questions · ~64 min
Time-Series Classification vs ForecastingHard
Recently asked

Design an ML pipeline that distinguishes classification from forecasting and applies correct splitting, time handling, evaluation, and monitoring.

Data Qualitydata pipelineMachine LearningThe Boston Consulting Group
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4
Behavioral & Leadership11 questions · ~100 min
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5
Statistics & Probability3 questions · ~27 min
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6
Machine Learning9 questions · ~82 min
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7
More topics7 questions · ~64 min
SQL and Data Manipulation AssessmentMedium
Practice
Recently asked

Prepare a latest-attempt modeling dataset with joined assessment features, missing-value counts, and outcome labels.

data preparationData ManipulationMachine LearningThe Boston Consulting Group
Explain LLMs vs Traditional MLEasy

Explain what an LLM is and how it differs from traditional machine learning models in training, behavior, and typical use cases.

llm basicsMachine Learningmodel comparisonInfosysWiproByteDance
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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
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