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
Understanding NULL Semantics in SQL
NULL in SQL is often a source of confusion, leading to bug propagation. Learning how NULL behaves in different scenarios to keep your query outputs trustworthy.
Tihomir Babic -
INTERSECT vs UNION in SQL for Reasoning About Overlapping Data
INTERSECT vs UNION in SQL: choose the wrong set operator, and the query returns a plausible but incorrect result, with no error and no warning to tell you so.
Sara Nobrega -
The AI Ponzi Scheme: Slap on a Chatbot, Raise Millions, Leave Engineers Holding the Bag
Everyone's chasing AI riches, but when the bubble bursts, engineers, not investors, will be left cleaning up the mess.
Tihomir Babic -
Python List Length: How to Find the Size of a List in Python
One-stop shop for product data scientists to brush up on the size of the list in Python - a core fundamental that’s an element of many key interview patterns.
Shivani Arun -
Career
All Career articles
You Don’t Need to Be a Math Genius for Data Science
Learn the truth about data science interviews and how deep you actually need to go into maths.
Tihomir Babic -
Career Path for Artificial Intelligence Engineers
Artificial intelligence engineers are a very hot commodity in today's data jobs market. Learn everything you need to know about an AI engineering career.
Nathan Rosidi -
Interviews
All Interviews articles
Understanding NULL Semantics in SQL
NULL in SQL is often a source of confusion, leading to bug propagation. Learning how NULL behaves in different scenarios to keep your query outputs trustworthy.
Tihomir Babic -
INTERSECT vs UNION in SQL for Reasoning About Overlapping Data
INTERSECT vs UNION in SQL: choose the wrong set operator, and the query returns a plausible but incorrect result, with no error and no warning to tell you so.
Sara Nobrega -
Guides
All Guides articlesUnderstanding NULL Semantics in SQL
NULL in SQL is often a source of confusion, leading to bug propagation. Learning how NULL behaves in different scenarios to keep your query outputs trustworthy.
Tihomir Babic -
INTERSECT vs UNION in SQL for Reasoning About Overlapping Data
INTERSECT vs UNION in SQL: choose the wrong set operator, and the query returns a plausible but incorrect result, with no error and no warning to tell you so.
Sara Nobrega -
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 -
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 -