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Data Quality Report

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

Interview Prompt

A data quality report on a batch of records needs per-column null and non-null counts. Return a dict mapping each column name to a dict with 'null_count' and 'non_null_count' keys.

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