In Alten iOS codebases, choosing between struct and class affects correctness, maintainability, and performance. Interviewers want to know whether you understand Swift value semantics rather than just memorizing rules.
Explain when you would use a struct versus a class in Swift for an iOS app. In your answer, cover:
A strong answer should compare the two directly, mention practical tradeoffs such as shared mutable state and ARC, and give concrete examples like models, view state, delegates, and coordinators. You do not need to discuss every Swift language feature, but you should show clear judgment about when each type is appropriate.