The Trapped Pool
A hard 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
- hard
- Seniority
- L5
Interview Prompt
A terrain survey hands you an elevation profile as a list of `heights`, each bar one unit wide. After a storm, water pools in the dips between taller bars; return the total units of water the profile holds once the level settles.
Summary
What collects in the valleys after the rain?
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