The One-of-Each
A easy Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- easy
- Seniority
- L3
Interview Prompt
Given a list of dicts (records) and a key name, return a new list containing the first occurrence of each distinct value at that key. Records that do not have the key are kept in order (they are not deduplicated against each other).
Summary
Strip the repeats, keep the originals.
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