The Wide View
A hard Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- hard
- Seniority
- L4
Interview Prompt
A reporting export arrives in long format: one record per cell, each carrying a row label, a col label, and a numeric val. Reshape it into a nested lookup keyed by row then column, so `result[row][col]` returns that cell's value.
Summary
Long format is easy. Wide format is useful.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your python solution with real code execution
- Get instant feedback and a hire/no-hire decision