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The Change Data Capture

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 warehouse does daily snapshots of a source table, and the incremental loader needs to know exactly what was added, changed, or removed since yesterday. Write a function that compares two snapshots by a key field and produces an insert/update/delete breakdown.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your python solution with real code execution
  4. Get instant feedback and a hire/no-hire decision