When the new Swift concurrency model was announced at WWDC 2021 we all wanted to jump on that wagon. However, rewriting your entire codebase might not be the best solution. Instead, you have the option to slowly start adapting the new model by bridging the old code with the new.
You use Xcode build configuration files to define all sorts of useful build settings. You can open them with different text editors outside of Xcode and all properties are in plain text. It's common to use them for managing constants across different environments.
Implementing network connectivity monitor doesn't require a lot of code. But it can mean a lot between a happy and a frustrated user.
A class diagram describes the structure of a system by showing its classes, their attributes, methods, and their relationships. It's one of the many diagrams of UML and a most common one. Knowing how to create a class diagram could give you an advantage and it's a useful skill to have. Creating a class diagram could come as an interview question.