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The Level Summer

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
junior, mid, senior

Interview Prompt

Our org chart analytics tool computes aggregate metrics at each level of the hierarchy. Write a function called level_sums that takes a tree represented as a nested dictionary with 'val' and 'children' keys, and returns a list where element i is the sum of all node values at depth i. The root is depth 0.

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