The Infection Spread
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
Given a 2D grid where 0 = empty, 1 = fresh orange, 2 = rotten orange, simulate minute-by-minute spread in 4 directions. Return the minimum minutes until all fresh oranges become rotten. Return -1 if any fresh orange is unreachable. Return 0 if there are no fresh oranges to begin with.
Summary
It starts with one, and then it spreads.
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