Swift Language Fundamentals Questions

Fundamental Swift language concepts and idioms that are commonly assessed in mobile interviews. Areas to master include core syntax and type system, optionals and optional handling, error handling patterns, closures and capturing semantics, value types versus reference types, protocol oriented programming, generics and type constraints, memory management with automatic reference counting, common standard library functions and higher order functions, concurrency primitives available in Swift, and best practices for writing idiomatic and testable iOS code.