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The Island Counter

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

A geospatial analysis tool needs to count discrete connected regions in a binary grid. Given a 2D grid of strings where '1' represents land and '0' represents water, return the number of islands. An island is formed by connecting adjacent land cells horizontally or vertically.

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