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Detect Cycle in Sequence

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

Interview Prompt

Our dependency resolver needs to detect infinite loops in task chains. Given a list of integers where each value points to the next index to visit (-1 means end), determine whether following the chain from index 0 revisits an index. Return True if a cycle exists.

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