Interview guides / ios
Protocol Extensions: iOS Interview Question
Protocol Extensions interview question with a clear example answer for iOS engineers. Practice with AceMobileInterview.
This is a common iOS interview topic: Protocol Extensions.
Below is a concise answer you can adapt in a real interview, then go deeper in the full AceMobileInterview track.
1.What can and can’t protocol extensions do? How do they relate to default implementations?
Extensions can add methods/computed properties with defaults, but can’t add stored properties. Default implementations let conforming types opt into behavior without boilerplate; dispatch is static unless requirements are protocol witnesses.
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