The Water Gauge
A medium Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- medium
- Seniority
- L4
Interview Prompt
A terrain heightmap is stored as a list of non-negative bar heights. After heavy rain, water collects in the dips between taller bars; return the total units of water the profile traps.
Summary
Elevation bars trap water in the dips. Total the volume.
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