The Column Transformer
A easy Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- easy
- Seniority
- L3
Interview Prompt
Given rows (list of dicts) and transforms (dict mapping column name to a string Python lambda), apply each transform to every row's corresponding column (in place). Return the list of transformed rows. Use eval to evaluate the lambda source strings.
Summary
Each column gets its function.
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