15 Real Data Science Interview Questions That Are Actually Asked, With Detailed Answers
Last Updated on December 9, 2025 by Editorial Team
Author(s): Alok Choudhary
Originally published on Towards AI.
These are the actual questions from a recent hiring drive for Associate/Junior Data Scientist positions.
All questions written in this story are real interview questions that were asked during a recent hiring assessment for data science roles. I’m sharing these questions to help fellow data science aspirants prepare better.

The article outlines 15 real interview questions that candidates might face during a data science interview, such as topics covering data literacy, SQL, probability and statistics, machine learning modeling, and data wrangling. Each section provides not only the questions asked but also insights into the reasoning behind the answers and the skills being evaluated, thereby serving as a guide for aspirants preparing for interviews in the field of data science.
Read the full blog for free on Medium.
Join thousands of data leaders on the AI newsletter. Join over 80,000 subscribers and keep up to date with the latest developments in AI. From research to projects and ideas. If you are building an AI startup, an AI-related product, or a service, we invite you to consider becoming a sponsor.
Published via Towards AI
Take our 90+ lesson From Beginner to Advanced LLM Developer Certification: From choosing a project to deploying a working product this is the most comprehensive and practical LLM course out there!
Towards AI has published Building LLMs for Production—our 470+ page guide to mastering LLMs with practical projects and expert insights!

Discover Your Dream AI Career at Towards AI Jobs
Towards AI has built a jobs board tailored specifically to Machine Learning and Data Science Jobs and Skills. Our software searches for live AI jobs each hour, labels and categorises them and makes them easily searchable. Explore over 40,000 live jobs today with Towards AI Jobs!
Note: Content contains the views of the contributing authors and not Towards AI.