The Water Gauge
A medium Python mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.
- 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 and run your Python against test cases
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision