Google Data Scientist Machine Learning Interview Questions

Practice 28 real Machine Learning interview questions for Data Scientist roles at Google.

28 Questions 1 Company12.29.2025
Showing 8 results
Role
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Google
Medium
Data Scientist

Compare Logistic Regression and Random Forest in Limited Data Scenarios

Compare Logistic Regression and Random Forest in Limited Data Scenarios You are designing a binary classifier with limited labeled data. The signal ma...

Machine Learning
97
0
257 people solved
Jul 12, 2025
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Google
Medium
Data Scientist

Explain Linear Regression to Non-Technical Stakeholders

Explain Linear Regression to Non-Technical Stakeholders You are explaining core machine-learning concepts to non-technical stakeholders during a proje...

Machine Learning
19
0
81 people solved
Jul 12, 2025
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Google
Hard
Data Scientist

Find companies similar to a given client

System Design: Retrieve Top-20 Most Similar Companies for Sales Prospecting You are given an anchor client (e.g., The Coca‑Cola Company). Design a sys...

Machine Learning
10
0
90 people solved
Oct 13, 2025
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Google
Medium
Data Scientist

Estimate b when features exceed samples

Consider the linear model y = Xb + ε with X ∈ R^{n×(m+1)} including an intercept. a) Derive the OLS estimator b̂ = (XᵀX)^{-1}Xᵀy, stating the rank con...

Machine Learning
13
0
94 people solved
Oct 13, 2025
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Google
Medium
Data Scientist

Adjust YouTube Ad Scores Using Mixed-Effects Linear Regression

Adjusting YouTube Ad Scores with Mixed-effects Regression One hundred reviewers each rate the same 100 YouTube ads on a 1 to 10 scale. Some reviewers ...

Machine Learning
12
0
105 people solved
Jul 12, 2025
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Google
Medium
Data Scientist

Identify and Fix Predictive Model Performance Gaps

Model Review: Month Encoding, Feature Scaling, and Imbalanced Data You are auditing an existing predictive model for operational performance. The curr...

Machine Learning
86
0
279 people solved
Jul 12, 2025
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Google
Medium
Data Scientist

Engineer Features to Enhance Smartphone Battery Life Prediction

Battery Life Prediction with Sparse History You are given sparse discharge traces that record battery percentage over elapsed time for prior usage ses...

Machine Learning
104
0
385 people solved
Jul 12, 2025
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Google
Medium
Data Scientist

Address Overfitting in Supervised Learning Models

Address Overfitting in Supervised Learning Models You are evaluating a supervised learning model and observe that training performance is much better ...

Machine Learning
15
0
53 people solved
Jul 12, 2025

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