The Dictionary Inverter
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
- L4
Interview Prompt
Given a dict d, return a new dict whose keys are the distinct values of d. Each key's value is a sorted list of original keys that had that value. Return the result as a dict; if the input values are integers they become string keys in the test harness (JSON convention).
Summary
Flip the dict. Group what used to be values.
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