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The Repeat Offenders

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
staff

Interview Prompt

Our data quality checker needs to flag repeated values in ingestion batches. Write a function called find_duplicates that takes a list and returns values appearing more than once - each duplicate listed only once, in order of first appearance.

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