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The Flat Mapper

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
junior, mid

Interview Prompt

Given a list that contains a mix of integers and nested lists of integers, return a flat list containing all integers in order. Only one level of nesting needs to be handled - you do not need to recurse into deeper nesting.

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