Requirements
Determine the different ways the system will be used. This includes main functions the system needs to perform and who will use it.
- provide the right parking section for different vehicle size
- check how many available spot left for a vehicle
- record which spot the vehicle has parked, the time it parked and calculate the fee
Define Core Objects
Based on the requirements and use cases, identify the main objects of the system...
class vehicle:
size, id, spot, start_time, end_time, occupied, fee
def
class parkingLot:
parked_vehicle_list
def check_spots(size) -> List
def park_vehicle(id, spot)
def free_vehicle(id)
def charge_fee(id)
Analyze Relationships
Determine how these objects will interact with each other to fulfill the use cases...
vehicle object is the element which record the information for every cars in the parkingLot
parkingLot provide functions to operate vehicles
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...
Nope
Design Patterns
Consider using design patterns (e.g., Factory, Singleton, Observer, Strategy) that fit the problem...
Nope
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...