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The Timing Decorator

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

Implement a Python decorator called timer that measures and prints the execution time of any function it wraps. The decorator should work correctly with functions that accept any number of positional and keyword arguments. Write a demo function that shows it working.

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