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📝 The Swift Language: iOS interview questions

1. What kinds of method dispatch does Swift have? Middle PRO
2. What is copy-on-write (CoW)? Middle PRO
3. What is type erasure and why is it needed? Senior PRO
4. What is an associated type in a protocol? Middle PRO
5. What is an enum? Junior PRO
6. Advantages of Swift? Junior PRO
7. What is an optional and what problems does it solve? Junior PRO
8. static or the class modifier? Junior PRO
9. Which Swift keyword creates recursive enums? Junior PRO
10. What is defer? Junior PRO
11. How do you pass a variable by reference? Junior PRO
12. final, private, @objc, dynamic — how do they affect dispatch? Senior PRO
13. Can you use @objc on a struct? Why not? Middle PRO
14. What is a closure and what does @escaping mean? Middle PRO
15. Equatable and Hashable — why? Why must a Dictionary key be Hashable? Junior PRO
16. == vs === — what's the difference? Junior PRO
17. let vs var for a struct — what changes with mutating methods? Junior PRO
18. Can you make a weak var for a struct? Why not? Middle PRO