What the Card Remembers
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
Interview Prompt
A card-authorization service records temporary holds as `[start, end]` minute offsets, and a single card can accumulate many holds that pile onto each other over a busy day. For each card, collapse the holds that overlap or touch into the continuous windows the money was actually held, earliest first.
Summary
A hold on your money is never a single moment. Rebuild the windows it actually lived in.
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