Data Science Educational Resources
StrataScratch is a data science educational platform with over 1,000+ real interview questions from your favorite companies.
Latest Blog Posts
All articles
How to Define and Use Static Methods in Python
A practical guide to defining and applying static methods in Python using Walmart’s Black Friday dataset to segment customer spending.
Nathan Rosidi - July 21, 2025
The Biggest Lie in Data Science: 'You Need to Build an App'
Most data scientists don’t need to build web apps. But if you must, this no-BS guide breaks down which frameworks actually make sense (and which don't).
Nathan Rosidi - July 16, 2025
Learn PySpark Joins Easily with This Guide
Master Inner, Left, and Complex Joins in PySpark with Real Interview Questions
Nathan Rosidi - July 14, 2025
Unsupervised Clustering: Methods, Examples, and When to Use
A practical guide to Unsupervised Clustering techniques, their use cases, and how to evaluate clustering performance.
Nathan Rosidi - July 9, 2025
Career
All Career articlesThe Biggest Lie in Data Science: 'You Need to Build an App'
Most data scientists don’t need to build web apps. But if you must, this no-BS guide breaks down which frameworks actually make sense (and which don't).
Nathan Rosidi - July 16, 2025
How We Oversaturated the Data Science Job Market
You thought you’d develop ML models and earn serious money. Instead, you’re still looking for a data science job four years later. We’ll look at why it’s like that and what you can do.
Nathan Rosidi - May 27, 2025
Why Your ML Job Feels Like a Lie (And What To Do About It)
Nathan Rosidi - May 2, 2025
Interviews
All Interviews articlesHow to Define and Use Static Methods in Python
A practical guide to defining and applying static methods in Python using Walmart’s Black Friday dataset to segment customer spending.
Nathan Rosidi - July 21, 2025
Learn PySpark Joins Easily with This Guide
Master Inner, Left, and Complex Joins in PySpark with Real Interview Questions
Nathan Rosidi - July 14, 2025
A Guide to Master Machine Learning Modeling from Scratch
Nathan Rosidi - July 8, 2025
How to Create a Bubble Plot with Python and Matplotlib?
Nathan Rosidi - June 25, 2025
What Is a Python Abstract Class? When and How to Use It
Nathan Rosidi - June 5, 2025
Guides
All Guides articlesHow to Define and Use Static Methods in Python
A practical guide to defining and applying static methods in Python using Walmart’s Black Friday dataset to segment customer spending.
Nathan Rosidi - July 21, 2025
The Biggest Lie in Data Science: 'You Need to Build an App'
Most data scientists don’t need to build web apps. But if you must, this no-BS guide breaks down which frameworks actually make sense (and which don't).
Nathan Rosidi - July 16, 2025
Unsupervised Clustering: Methods, Examples, and When to Use
Nathan Rosidi - July 9, 2025
A Guide to Master Machine Learning Modeling from Scratch
Nathan Rosidi - July 8, 2025
Companies
All Companies articles
What Does It Take to Be a Data Engineer at Google
Journeying through Skills, Perks, and Application Insights for Aspiring Google Data Engineers
Nathan Rosidi - May 23, 2024
Microsoft SQL Interview Questions
We'll discuss one of the interesting Microsoft SQL interview questions to help prepare you for applying for a role as a Microsoft data scientist.
Nathan Rosidi - October 30, 2023
LinkedIn Data Scientist Interview Questions
Nathan Rosidi - October 30, 2023
40+ Data Science Interview Questions From Top Companies
Nathan Rosidi - October 30, 2023
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