The Complement Hunt
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
- L4
Interview Prompt
A fraud monitor ingests a stream of transaction `amounts` in arrival order, watching for two that were split to reach a flagged `target`. As each amount arrives, report the position of the earliest earlier amount that pairs with it to reach the target, or `-1` if no earlier amount does.
Summary
Every number is looking for its other half.
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