Object-Oriented Design Interview: Parking Lot

"Design a parking lot" is the most common object-oriented design (OOD) question. The interviewer is checking whether you can turn vague requirements into clean classes and responsibilities, not whether you know a single right answer.

Clarify first

• Multiple floors? Spot sizes (motorcycle, compact, large, EV charging)?
• Entry and exit gates, tickets, payment (hourly rate, flat fee)?
• Should it show free spots per floor on a display board?