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Machine Learning Interview Questions & Answers for Data Scientists

Youssef Hosni
Level Up Coding
Published in
33 min readJun 25, 2022

Machine learning has become essential for solving many real-world problems across various industries. As more companies adopt machine learning, the demand for skilled machine learning engineers and data scientists continues to grow.

Landing your dream job in this exciting field requires preparation, especially for the machine learning interview. This guide covers the most common machine learning interview questions asked by top tech companies.

Divided into sections on fundamental algorithms, model types, performance evaluation, and more — each question is accompanied by a clear explanation to help you understand the concepts in-depth. Whether you’re an aspiring or experienced data scientist, this compilation of key machine learning interview questions and expert answers will prove invaluable for interview preparation and advancing your machine learning knowledge.

Table of Contents:

  1. Basic Machine Learning Questions & Answers
  2. Supervised Machine Learning Questions & Answers
  3. Unsupervised Machine Learning Questions & Answers
  4. Tree-based Models Questions & Answers
  5. Ensemble Learning Models Questions & Answers
  6. Model Evaluation Questions & Answers
  7. Data Preprocessing & Feature Engineering Questions & Answers

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