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
Exploring NumPy where() in Python for Conditional Operations
Master NumPy where() for smarter data filtering, conditional replacements, and interview-ready logic with clean, efficient Python code.
Nathan Rosidi - September 17, 2025
How to Implement Delays Using Python WAIT Function
A Complete Guide to Implementing Waits in Python Using Sleep, Asyncio, Threading, and Subprocesses
Nathan Rosidi - September 8, 2025
Implementing a Logit Model in R Effectively
How to build and interpret a logit model in R to predict customer churn: data preparation, modeling, and evaluation
Nathan Rosidi - September 4, 2025
Case Statement in Python: Best Practices and Alternatives
Mastering case statement in Python with best practices, alternatives, and real-life applications
Nathan Rosidi - August 26, 2025
Career
All Career articles
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
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 articlesExploring NumPy where() in Python for Conditional Operations
Master NumPy where() for smarter data filtering, conditional replacements, and interview-ready logic with clean, efficient Python code.
Nathan Rosidi - September 17, 2025
Implementing a Logit Model in R Effectively
How to build and interpret a logit model in R to predict customer churn: data preparation, modeling, and evaluation
Nathan Rosidi - September 4, 2025
Case Statement in Python: Best Practices and Alternatives
Nathan Rosidi - August 26, 2025
How to Effectively Use the PySpark 'isin' Function
Nathan Rosidi - August 13, 2025
Creating R Programming Histogram for Data Visualization
Nathan Rosidi - August 7, 2025
Guides
All Guides articlesExploring NumPy where() in Python for Conditional Operations
Master NumPy where() for smarter data filtering, conditional replacements, and interview-ready logic with clean, efficient Python code.
Nathan Rosidi - September 17, 2025
How to Implement Delays Using Python WAIT Function
A Complete Guide to Implementing Waits in Python Using Sleep, Asyncio, Threading, and Subprocesses
Nathan Rosidi - September 8, 2025
Case Statement in Python: Best Practices and Alternatives
Nathan Rosidi - August 26, 2025
How to Effectively Use the PySpark 'isin' Function
Nathan Rosidi - August 13, 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
Become a data expert. Subscribe to our newsletter.