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The Category Ranker
A medium Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- medium
- Seniority
- senior
Interview Prompt
The feature store emits thousands of scored records across dozens of categories, and the serving layer needs only the top performers from each group for real-time inference. Write a function that groups records by category and returns the top N per category, sorted by value descending. Ties should preserve the original insertion order.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your python solution with real code execution
- Get instant feedback and a hire/no-hire decision