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The Schema Migrator
A hard Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- hard
- Seniority
- senior, staff
Interview Prompt
The data lake has thousands of records stuck in an old schema, and a batch migration needs to reshape them all according to a list of field-level operations. Write a function that applies rename, add, remove, and type-cast operations to records, supporting nested fields via dot notation.
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