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The Config Blender

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

Domain
Python
Difficulty
easy
Seniority
junior, mid

Interview Prompt

The deployment system has base configs and environment-specific overrides, both as nested dictionaries. A simple dict update clobbers nested keys the team still needs. Write a function that deep-merges two config dicts so overrides win at every level without wiping out unrelated nested settings.

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