Master Low Level Design
Interviews

Requirements

Identify functional & non-functional requirements and scope the problem.

Core Entities

Model the core domain entities, their attributes, and relationships.

Classes & Relationships

Architect class hierarchies, interfaces, and design patterns.

Code Implementation

Implement clean, SOLID, production-grade code with proper abstractions.

Edge Cases & Tests

Define the validation rules, error model, and key test scenarios.

Extensibility & Trade-offs

Show how the design extends (Open/Closed) and weigh the complexity trade-offs.