The Schema Differ
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
Given new_schema and old_schema (each a list of {'name', 'type'} dicts), return a dict with: 'added' (list of column names in new only), 'removed' (list of column names in old only), 'type_changed' (list of {'name', 'new_type', 'old_type'} dicts where the same column name has a different type). Sort 'added' and 'removed' by name ascending, and sort 'type_changed' by 'name' ascending.
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