Modular and Component Based Design Questions

Principles and practices for decomposing large codebases into modular, reusable components and feature modules. Covers defining module boundaries and public interfaces, managing internal and external dependencies, build and packaging considerations (including techniques for on-demand or dynamic delivery of feature modules where a platform supports it, such as Android dynamic feature modules or iOS frameworks), strategies to enforce encapsulation and interface stability, testing and continuous integration for independently built modules, and team ownership models for module boundaries. Candidates should be able to propose a modularization plan for a legacy codebase, discuss migration approaches, and explain trade-offs between reuse and complexity.