A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

medium

Seniority

L4

Problem

Given old_schema and new_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', 'old_type', 'new_type'} dicts where the same column name has different types). Sort each list by name ascending.

Summary

Schema from yesterday vs today. Something changed.

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