Deep Flatten
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
- L4
Interview Prompt
Given a list that may contain other lists nested to arbitrary depth, return a single flat list of all leaf values in left-to-right order. Non-list values are leaves; strings are leaves (do not iterate into them).
Summary
Nested deep. Flatten everything.
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