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The Cipher Wheel

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, mid

Interview Prompt

A data masking pipeline needs to substitute characters in strings based on a lookup table. Given a string and a character-to-character mapping dictionary, return a new string where each character is replaced by its mapped value. Characters not in the mapping should remain unchanged.

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