Cross Platform Compatibility and Build Optimization Questions

Understand the challenges of building software that runs correctly across multiple platforms: differing hardware capabilities (GPU/CPU constraints, memory limits), differing operating systems and file systems, differing input methods (keyboard, mouse, touch, controller), and differing screen sizes, resolutions, and aspect ratios. Discuss code structure that supports multiple platforms cleanly using conditional compilation, abstraction layers, and platform-specific modules versus a shared core. Understand build size implications and optimization across targets: asset and dependency compression, platform-specific build formats, and minimizing binary or bundle size. Discuss strategies for testing across platforms and managing device fragmentation, including device labs, emulators and simulators, and automated cross-platform CI.