Requirements

Parking Lot system manages different types of parking spots across multiple floors, providing short-term and monthly spots. The main functionalities are as follows:

  • The system should be able to assign parking spots based on request size.
  • The system should be able to show the availability of parking spots.
  • The system should be able to calculate the fee based on parking duration and parking spot type. A daily maximum fee is applied.
  • The system should provide the administrator APIs to configure parking spots.
  • The system should provide short-term and monthly fixed-location parking services.


Define Core Objects

  • ParkingLot
  • ParkingFloor
  • ParkingSpot
  • Ticket
  • Vehicle







Analyze Relationships

  • ParkingLot contains multiple ParkingFloors.
  • ParkingFloor contains multiple ParkingSpot.
  • The ticket relates to one ParkingSpot.
  • The ticket relates to one Vehicle.
  • One Vehicle occupied one ParkingSpot.





Establish Hierarchy

Design inheritance trees where applicable to promote code reuse and polymorphism. This step involves identifying common attributes and behaviors that can be abstracted into parent classes...






Design Patterns

Consider using design patterns (e.g., Factory, Singleton, Observer, Strategy) that fit the problem...






Define Class Members (write code)

Attributes: For each class, define the attributes (data) it will hold...

Methods: Define the methods (functions) that operate on the attributes. Ensure they align with the object's responsibilities and adhere to the principle of encapsulation.


public class Car { ... } // Example






Adhere to SOLID Guidelines

Check and explain whether your design adheres to solid principles (Ask interviewer what SOLID principle is if you can not recall it.)...






Consider Scalability and Flexibility

Explain how your design can handle changes in scale and whether it would be easily to extend with new functionalities...






Create/Explain your diagram(s)

Try creating a class, flow, state and/or sequence diagram using the diagramming tool. Mermaid flow diagrams can be used to represent system use cases. You can ask the interviewer bot to create a starter diagram if unfamiliar with the tool. Briefly explain your diagrams if necessary...






Future improvements

Critically examine your design for any flaws or areas for future improvement...