What Changed Overnight
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 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 and run your Python against test cases
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision