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Design an alarm clock app for the iPhone

Discuss the MVVM (Model-View-ViewModel) design pattern and its pros and cons

We require a solution to turn a given square matrix clockwise, without resorting to creating another matrix.

What are the mechanisms behind memory management in iOS?

Contrast the synchronous against asynchronous processes within iOS application development.

What sets OperationQueue apart from GCD?

Discuss your ideas on how you would optimize the performance and speed of Spotify for iOS without compromising its design and functionality.

Unravel the different paths one can take to achieve asynchronous method calls in iOS. Elucidate the essence of completion handlers, unravel the practicality of async/await, and touch upon additional techniques that aid in proficiently handling asynchronous tasks.

Propose a design scheme for a robust iOS file manager application.