In the Allegiant mobile app, closures are common in async networking, UI callbacks, and view model bindings. A Mobile Engineer should understand how Swift memory management interacts with closures to prevent leaks.
Explain how you manage memory and avoid retain cycles when using closures in Swift.
Your answer should cover:
[weak self] versus [unowned self], and how to safely handle each.The interviewer expects a practical engineering explanation, not just definitions. You should describe what happens under the hood, show short Swift examples, explain trade-offs, and mention common mistakes such as overusing weak, force-unwrapping self, or assuming every closure creates a cycle.