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
- L3
Interview Prompt
Your team's data masking tool swaps characters according to a per-tenant config. Given a plaintext string `text` and a `mapping` from characters to their replacements, return the masked string, leaving any character that has no entry in `mapping` untouched.
Summary
Every letter has an alias - you just need the right codebook.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your python solution with real code execution
- Get instant feedback and a hire/no-hire decision