Advanced Mobile Platform Expertise Questions

Deep mastery of mobile platform internals and advanced application programming interfaces across iOS and Android. Assess the ability to explain complex technical concepts and to apply fundamental principles to novel problems. On iOS this includes Grand Central Dispatch and other concurrency primitives, memory management patterns and retain cycle diagnosis, Swift concurrency and reactive paradigms, view rendering performance, and profiling and debugging user interface and memory issues. On Android this includes Kotlin coroutines and flow, threading models and synchronization, Android Jetpack component interactions, custom view composition and rendering performance, and garbage collection and memory profiling practices. Candidates should be able to reason about platform internals, design thread safe and efficient solutions, evaluate cross platform tradeoffs, and articulate low level debugging and performance optimization approaches.