Ways to approach a general Design problem.

• Use Cases Generation: Gather all the possible use cases

• Constraints and Analysis: How many users, how much data etc.

• Basic Design: Most basic design. Few users case.

• Bottlenecks: Find the bottlenecks and solve them.

• Scalability: A large number of users. 4 and 5 step will go in loop till we get a satisfactory answer

Current Scenario

1. Use cases for this problem.

• Parking can be single-level or multilevel.
• Types of vehicles that can be parked, separate spaces for each type of vehicle.
• Entry and exit points.

2. Constraints

• Number of vehicles that can be accommodated of any type.

3. Basic Design/High-Level Components

• Vehicle/Type of vehicle.
• Entry and Exit points.
• Different spots for vehicles.

4. Bottlenecks

• Capacity breach for any type of vehicle.

5. Scalability

• Scalable from single-level to multi-level
• Scalable from Bike only parking to accommodate all kinds of vehicles.

Keeping these in minds, APIs can be designed in the language of your preference.