Roots and Branches
A hard Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- hard
- Seniority
- L5
Interview Prompt
An org-chart export arrives as a flat list of `[manager, report]` pairs in no particular order, and you need to rebuild it into a nested dict where each name maps to the dict of people directly reporting to them. Anyone with no reports maps to an empty dict, and the whole structure hangs off the single person who appears as a manager but never as someone's report. Assume exactly one such root.
Summary
The chain of command arrives in pieces. Find where it begins.
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