The Island Counter
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 satellite land-cover raster arrives as a grid of cells, each the string '1' for land or '0' for water. Return how many distinct islands the raster contains, where an island is a maximal group of land cells that touch.
Summary
Surrounded by water, connected by land - how many separate landmasses?
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