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The Paired Doors

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

A code linting tool needs to verify that all grouping symbols in a file are properly matched and nested. Given a string containing only parentheses, square brackets, and curly braces, return True if the string is valid. A string is valid if every opening symbol has a matching closing symbol in the correct order.

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