Interview guides / ios

Value vs Reference Types: iOS Interview Question

Value vs Reference Types interview question with a clear example answer for iOS engineers. Practice with AceMobileInterview.

This is a common iOS interview topic: Value vs Reference Types.

Below is a concise answer you can adapt in a real interview, then go deeper in the full AceMobileInterview track.

1. 1.Explain value types vs reference types and how copying behaves.

   Value types (struct/enum) copy on assignment; reference types share one instance. Mutations to a copy don’t affect the original. Copy-on-write optimizes large values like Array/Dictionary/String.