Data Science Educational Resources
StrataScratch is a data science educational platform with over 1,000+ real interview questions from your favorite companies.
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How to Effectively Use the PySpark 'isin' Function
PySpark isin explained with filtering examples using lists, variables, combined columns, and a real interview-style case study
Nathan Rosidi - August 13, 2025
Creating R Programming Histogram for Data Visualization
Step-by-step guide to creating, customizing, and interpreting R programming histograms using real student performance data
Nathan Rosidi - August 7, 2025
How to Perform Exploratory Data Analysis in Python (With Example)
Step-by-step Exploratory Data Analysis in Python: From summarizing and visualizing to cleaning and preparing data for modeling.
Nathan Rosidi - August 4, 2025
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
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 articlesHow to Effectively Use the PySpark 'isin' Function
PySpark isin explained with filtering examples using lists, variables, combined columns, and a real interview-style case study
Nathan Rosidi - August 13, 2025
Creating R Programming Histogram for Data Visualization
Step-by-step guide to creating, customizing, and interpreting R programming histograms using real student performance data
Nathan Rosidi - August 7, 2025
How to Perform Exploratory Data Analysis in Python (With Example)
Nathan Rosidi - August 4, 2025
Guides
All Guides articlesHow to Effectively Use the PySpark 'isin' Function
PySpark isin explained with filtering examples using lists, variables, combined columns, and a real interview-style case study
Nathan Rosidi - August 13, 2025
Creating R Programming Histogram for Data Visualization
Step-by-step guide to creating, customizing, and interpreting R programming histograms using real student performance data
Nathan Rosidi - August 7, 2025
How to Perform Exploratory Data Analysis in Python (With Example)
Nathan Rosidi - August 4, 2025
The Biggest Lie in Data Science: 'You Need to Build an App'
Nathan Rosidi - July 16, 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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