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Group Average

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 rollup step averages metric values grouped by a category key. The input is a list of [key, value] pairs. Return a dict mapping each key to the average of its associated values.

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