Against the Grain
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
- L4
Interview Prompt
A metrics export comes back as a `grid` of equal-length rows, one row per day and one column per metric. Reorient it so each metric's column becomes its own row, and return an empty list when `grid` has no rows or its rows are empty.
Summary
Turn the grid on its side and let every column stand up as a row.
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