notes

Low Level Design Interview

Delivery Framework

1. Requirements

1. Primary capabilities
2. Rules and completion - what conditions define success, failure, or when the system stops or transitions state
3. Error handlings
4. Scope boundaries

2. Entities and Relationships

3. Class Design

For each enttity define state and behavior based on requirements.

4. Implementations

Start with happy path, then go into edge cases.

1. Happy Path - walk through method in a linear way, what the input, sequence of steps and finish on what it returns on how the state changes.
2. Edge Cases
   • invlid inputs
   • illegal operations
   • out-of-range values
   • calls that violate current system state

Validate your solution.