What Changed Overnight
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 migration ran overnight, and you have the table's columns from before it (`old_schema`) and after (`new_schema`), each a list of `{'name', 'type'}` dicts. Return which columns were added, which were removed, and which kept their name but changed type.
Summary
Schema from yesterday vs today. Something changed.
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