Master coding
for data science
StrataScratch is a data science platform with over 1,000+
real interview questions from your favorite companies
500+ Interview Coding Questions From Your Favorite Companies
Features
Building Blocks For A Successful
Career In Data Science
Tracking interviews from your favorite companies
Track real interview questions from your favorite companies with regular updates
Code in SQL, python, & R
Code your solutions in SQL and python using our code-execution environment that lets you validate your solution
Real data science problems
We focus on teaching you how to solve real-world data science problems, not just proper coding syntax
Statistics
The Best Place To Master Coding
For Data Science
1,000+
Interview Questions
100,000+
Community Members
200+
Companies Tracked
Blog
Data Science Educational Resources
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
A Comprehensive Step-by-Step Guide to Full Outer Join in SQL
The FULL OUTER JOIN is a very useful but often overlooked SQL join. In this article, we’ll discuss how it works, when to use it, and give practical examples.
Nathan Rosidi - March 25, 2025
What are you waiting for?
Start coding now
The first 50 questions are free to solve. Jumpstart your career in data science now.
Start Coding Now
Become a data expert. Subscribe to our newsletter.