Coalesce Fields
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
- L3
Interview Prompt
Given primary and defaults dicts, return a merged dict where every key in primary is kept, but if primary[key] is None it is replaced by defaults[key] (if the key exists in defaults). Keys only in defaults are NOT added.
Summary
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How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your python solution with real code execution
- Get instant feedback and a hire/no-hire decision