Senior iOS Software Developer Interview Questions and Answers

Escaping and non-escaping are terms used in Swift for closures.

• Escaping closures are those that are executed after the function has returned.

• Non-escaping closures are executed within the function and do not outlive the function.

• Escaping closures are marked with @escaping keyword in Swift.

• Escaping closures are useful when the closure needs to be stored for later use or passed to another function.

Dependency injection is a design pattern where the dependencies of an object are provided externally rather than being created internally.

• Dependency injection helps in achieving loose coupling between objects.

• It allows for easier testing and maintenance of code.

• There are three types of dependency injection: constructor injection, setter injection, and interface injection.

• Example: In iOS development, dependency injection can be used to inject dependencies like network clients ...read more

A closure is a function that has access to variables in its lexical scope, even when the function is executed outside that scope.

• A closure is created when a function is defined inside another function and the inner function uses variables from the outer function.

• Closures can be used to create private variables and functions in JavaScript.

• Closures can also be used to create functions with pre-set arguments or to create functions that can be called multiple times with different...read more

Messaging and protocol are two different concepts in software development.

• Messaging refers to the exchange of information between different components or systems.

• Protocol refers to a set of rules and standards that govern the communication between different components or systems.

• Messaging is more flexible and can be used in a variety of scenarios, while protocol is more rigid and specific.

• Examples of messaging include email, instant messaging, and push notifications, while ex...read more