StrataScratch
Practice real data science interview questions in SQL and Python
StrataScratch gives you real interview questions for data science, analytics, machine learning and AI roles. You solve coding questions in SQL or Python, answer concept questions, and can try take-home tasks like those companies send. The site lists more than 1,000 questions.
Freemium · Browser · Intermediate
About StrataScratch
It trains the data skills that interviews at large tech companies test, such as joins, aggregations and data cleaning. It suits people preparing for data jobs who want practice close to real interviews.
You can start coding for free with no credit card, and free learning paths cover SQL and Python with more than 160 questions each. You need an account, and a paid plan opens more content.
On Breakpoint since 23 Oct 2026.