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The Event Aggregator

A medium Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain
Python
Difficulty
medium
Seniority
mid, senior

Interview Prompt

The analytics pipeline receives a firehose of timestamped bidding events and needs them rolled up into fixed time windows for the reporting dashboard. Write a function that groups events into buckets of a given width and returns the count and total value per window.

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