Data Scientist Machine Learning Interview Questions

Practice 434 real Machine Learning interview questions for Data Scientist roles. From companies including Meta, Amazon, Google, Capital One, TikTok.

434 Questions 85 Companies08.03.2026
Showing 20 results
Role
TikTok logo
TikTok
Medium
Data Scientist

Personalize Ad Delivery Using Machine Learning Techniques

Personalize Ad Delivery Using Machine Learning Techniques Personalized Delivery of Three Ad Categories Scenario You operate a consumer feed with a sin...

Machine Learning
2
0
33 people solved
Aug 4, 2025
Capital One logo
Capital One
Medium
Data Scientist

Evaluate Python Class Design in Data Pipeline

Evaluate Python Class Design in Data Pipeline Scenario You are reviewing a Python class used in an ML/data pipeline that follows the scikit-learn-styl...

Machine Learning
3
0
53 people solved
Aug 4, 2025
Spokeo logo
Spokeo
Medium
Data Scientist

Explain Key Terms in Model Evaluation for Fraud Detection

Explain Key Terms in Model Evaluation for Fraud Detection Model Evaluation Terminology and Business Trade-offs Scenario Phone screen focused on unders...

Machine Learning
3
0
36 people solved
Aug 4, 2025
TikTok logo
TikTok
Medium
Data Scientist

Predict User Churn with Effective Modeling Techniques

Predict User Churn with Effective Modeling Techniques Predicting User Churn for a Subscription App Context You are building a model to predict which a...

Machine Learning
4
0
52 people solved
Aug 4, 2025
Upstart logo
Upstart
Hard
Data Scientist

Design a Real-Time Personalized Ad Selection System

Design a Real-Time Personalized Ad Selection System End-to-End ML System Design: Real-Time Ad Selection Context You need to design a real-time, data-d...

Machine Learning
7
0
118 people solved
Aug 4, 2025
Upstart logo
Upstart
Medium
Data Scientist

Design Push-Notification System for Airport Surge Pricing

Design Push-Notification System for Airport Surge Pricing Designing Airport Surge Push Notifications for Drivers Context You are building a real-time ...

Machine Learning
46
0
88 people solved
Aug 4, 2025
Upstart logo
Upstart
Hard
Data Scientist

Address Missing Income Bracket in California Housing Data

Address Missing Income Bracket in California Housing Data ML Case: Missing Lowest-Income Bracket in California Housing Data Context You're building a ...

Machine Learning
32
0
86 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Data Scientist

Compare RNNs and Transformers for Long-Sequence Text Classification

Compare RNNs and Transformers for Long-Sequence Text Classification Scenario You are designing a long-sequence text classification system under tight ...

Machine Learning
48
0
102 people solved
Aug 4, 2025
PayPal logo
PayPal
Hard
Data Scientist

Explain unsupervised fraud and evaluation

Explain unsupervised fraud and evaluation Unsupervised Fraud Detection: Methods, When to Use Them, and How to Evaluate Without Reliable Labels Context...

Machine Learning
4
0
69 people solved
Jul 31, 2025
Citibank logo
Citibank
Medium
Data Scientist

Discuss logistic regression limitations for PD

Discuss logistic regression limitations for PD Limitations of Logistic Regression for PD (Probability of Default) Modeling Context You are building a ...

Machine Learning
2
0
36 people solved
Jul 26, 2025
Citibank logo
Citibank
Medium
Data Scientist

Explain PD model validation steps

Explain PD model validation steps Validate a Newly Developed Probability of Default (PD) Model Context Assume you have built a retail credit Probabili...

Machine Learning
9
0
182 people solved
Jul 26, 2025
Amazon logo
Amazon
Medium
Data Scientist

Handle Missing Values and Choose ML Algorithms Wisely

ML Interview: Core Modeling Concepts You are in a technical phone screen for a Data Scientist role. Assume primarily tabular datasets and address both...

Machine Learning
62
0
198 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist

Optimize Email Strategy for New Prime Video Series Launch

Optimizing Email Strategy for a New Prime Video Series Launch You are designing, deploying, and evaluating ranking models and marketing emails for Pri...

Machine Learning
69
0
30 people solved
Jul 12, 2025
OneMain Financial logo
OneMain Financial
Medium
Data Scientist

Handle Missing Values and Outliers in Machine Learning

Handling Missing Values and Outliers in Machine Learning You are building classification and regression models on tabular business data with missing v...

Machine Learning
48
0
58 people solved
Jul 12, 2025
TikTok logo
TikTok
Medium
Data Scientist

Compare Random Forests and Boosted Trees: Bias, Variance, Speed

Compare Random Forests and Gradient-Boosted Trees You are choosing and configuring tree-based ensemble models for a product-facing data-science proble...

Machine Learning
157
4
227 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist

Optimize Feature Selection and Handling in Machine Learning Models

Optimize Feature Selection and Handling in Machine Learning Models You are building a customer propensity model to predict whether a user will purchas...

Machine Learning
20
0
115 people solved
Jul 12, 2025
Amazon logo
Amazon
Hard
Data Scientist

Build Accurate Energy Consumption Prediction Model for Utilities

Build an Energy Consumption Prediction Model for Utilities You need to build and productionize a regression model that predicts daily energy consumpti...

Machine Learning
15
0
51 people solved
Jul 12, 2025
WeRide logo
WeRide
Medium
Data Scientist

Evaluate Guangzhou performance with limited data

You have built an autonomous-driving evaluation system using a large amount of labeled data from Beijing. The company now wants to operate in Guangzho...

Machine Learning
5
0
44 people solved
Jan 23, 2025
Cfm logo
Cfm
Hard
Data Scientist Locked

Compute Random Walk Hitting and Return Probabilities

This question evaluates understanding of probability theory and stochastic processes, specifically simple symmetric random walks, expected hitting tim...

Machine Learning
1
0
11 people solved
May 31, 2026
Uber logo
Uber
Medium
Data ScientistNew Grad Locked

Model Driver Acceptance Probability

This question evaluates a candidate's competency in production machine learning system design and operationalization, including label definition and u...

Machine Learning
5
0
63 people solved
Feb 27, 2026

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