Top 46
Prep plan
Updated weekly · Last refresh Aug 30

eBay Machine Learning Engineer Interview Questions

The questions to prepare for a eBay Machine Learning Engineer interview. Questions from real interview reports rank first. Updated weekly.

46questions
~7htotal time
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1
CodingStart here. 7 questions · ~62 min
Calculate Classification AccuracyEasy
Practice

Implement a function that computes classification accuracy by comparing predicted labels with true labels.

MathArraysStringseBay
Decision Tree From ScratchHard
Practice

Implement a CART-style decision tree from scratch using Gini impurity, recursive splitting, and deterministic predictions.

RecursionTreesDecision TreeseBay
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2
System Design10 questions · ~89 min
Choose Online vs Batch ServingHard

Choose an architecture for model inference, comparing online and batch serving for a production ML system.

InfrastructureTrade-offsModel ServingeBay
Deploy a Cloud ML Inference SystemMedium

Design a cloud ML deployment system for a security product, covering training, serving, updates, and production monitoring.

InfrastructureFeature DriftModel ServingeBay
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3
Machine Learning13 questions · ~115 min
Handling Missing Values in MLEasy
Recently asked

Explain practical strategies for handling missing values in a supervised learning workflow, from diagnosis to modeling and validation.

Cross-ValidationFeature EngineeringRegularizationeBay
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4
Pipelines4 questions · ~35 min
Machine Learning Pipeline ComponentsMedium

Tests knowledge of end-to-end pipeline design from data ingestion to training and monitoring.

ETLOrchestrationQualityeBay
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5
Model Evaluation4 questions · ~35 min
Model Performance MetricsEasy

Tests metric selection and understanding of when to use each metric for ML tasks.

PrecisionAccuracyRecalleBay
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6
Behavioral & Leadership6 questions · ~53 min
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7
More topics2 questions · ~18 min
TF-IDF Vector SizeEasy

Tests your understanding of TF-IDF representation dimensionality.

TF-IDFeBay
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