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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
mid, senior

Interview Prompt

Given a list of non-negative integers representing an elevation map where each value is the height of a bar of width 1, calculate how much water can be trapped between the bars after it rains. Return the total number of water units trapped.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your python solution with real code execution
  4. Get instant feedback and a hire/no-hire decision