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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

Interview Prompt

Our API responses occasionally return arbitrarily nested list structures that downstream consumers expect flat. Flatten a deeply nested list into a single list of all leaf values, regardless of nesting depth.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your python solution with real code execution
  4. Get instant feedback and a hire/no-hire decision