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The Shadow Cleaner

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
junior

Interview Prompt

Our data quality layer removes duplicates from record streams. Write a function called dedup that takes a list and returns a new list with duplicates removed, preserving the first occurrence order. Do not use set(), dict.fromkeys(), or any similar built-in dedup shortcut.

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