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🦅 Modern Swift: iOS interview questions

1. some vs any (opaque types vs existentials)? Senior PRO
2. What is a property wrapper? Middle PRO
3. What is a result builder? Middle PRO
4. What are macros (Swift 5.9+)? Senior PRO
5. generics and associated types — why? Middle PRO
6. How does ARC work and when do retain cycles occur? Middle PRO
7. value type vs reference type — how to choose? Middle PRO
8. What is typed throws (Swift 6)? Senior PRO
9. What is an existential container (any P)? Why is any costlier than T: P? Senior PRO
10. Witness table vs vtable — what's the difference? Senior PRO
11. How does the Swift compiler optimize calls (devirtualization, WMO)? Senior PRO
12. What is SIL and how is stack vs heap decided? Senior PRO