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
Using Principal Component Analysis in R for Real-World Data
A hands-on guide to using PCA in R with DoorDash data—cleaning, visualising, and modelling compressed dimensions that actually make sense.
Nathan Rosidi - April 23, 2025
Looping Through Lists in Python: A Comprehensive Tutorial
Learn how to loop through a list in Python using real Uber data, practical techniques, and performance-friendly tips.
Nathan Rosidi - April 9, 2025
LLM Deep Dive: Practitioner vs. Researcher Path
There are two main approaches to learning LLMs if you already have ML experience. We explore them in this article and give suggestions on what to know.
Nathan Rosidi - April 5, 2025
Python List Manipulation: Convert Lists to Strings
Convert list to string Python using practical, real-world techniques. Learn clean methods, handle edge cases, and apply them in logging, files, and UIs.
Nathan Rosidi - April 4, 2025
Career
All Career articles
11 Data Analytics Projects for Every Level
Data analytics projects are great for practicing and showcasing your analytics skills. Here are project suggestions for every level and resources to use.
Nathan Rosidi - March 18, 2025
AI-Proof Your Data Science Career With These 4 Skills
Is data science here to take your data job? How can you stay relevant amidst tectonic tech changes? We attempt to answer these questions in the article.
Nathan Rosidi - March 13, 2025
Dating Your Data Science Team: Red & Green Flags to Watch For
Nathan Rosidi - December 12, 2024
Interviews
All Interviews articlesUsing Principal Component Analysis in R for Real-World Data
A hands-on guide to using PCA in R with DoorDash data—cleaning, visualising, and modelling compressed dimensions that actually make sense.
Nathan Rosidi - April 23, 2025
Looping Through Lists in Python: A Comprehensive Tutorial
Learn how to loop through a list in Python using real Uber data, practical techniques, and performance-friendly tips.
Nathan Rosidi - April 9, 2025
A Comprehensive Step-by-Step Guide to Full Outer Join in SQL
Nathan Rosidi - March 25, 2025
Introduction to Polars: Everything You Must Know?
Nathan Rosidi - March 1, 2025
Guides
All Guides articlesLooping Through Lists in Python: A Comprehensive Tutorial
Learn how to loop through a list in Python using real Uber data, practical techniques, and performance-friendly tips.
Nathan Rosidi - April 9, 2025
LLM Deep Dive: Practitioner vs. Researcher Path
There are two main approaches to learning LLMs if you already have ML experience. We explore them in this article and give suggestions on what to know.
Nathan Rosidi - April 5, 2025
A Comprehensive Step-by-Step Guide to Full Outer Join in SQL
Nathan Rosidi - March 25, 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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