Photon Interactive IOS Developer Interview Questions, Process, and Tips

Questions about basic Swift knowledge and past work experience.

• Basic Swift concepts such as optionals, closures, and protocols may be asked.

• Questions about past projects and how you approached problem-solving may also be asked.

• Examples of past work experience and projects may be requested.

• Questions about Swift syntax and best practices may be asked as well.

Clean coding principles ensure code readability, maintainability, and scalability.

• Use meaningful variable and function names

• Keep functions short and focused

• Avoid code duplication

• Follow SOLID principles

• Write unit tests

• Refactor regularly

diff is used to compare two collections and return the differences, while guard is used for early exit in a function if a condition is not met.

• diff is a method used in Swift to compare two collections and return the differences.

• guard is a keyword used in Swift to provide an early exit from a function if a condition is not met.

• Example: let array1 = [1, 2, 3, 4], array2 = [3, 4, 5, 6]; let result = array1.diff(array2) //...read more

GCD stands for Grand Central Dispatch, a technology used in iOS for managing concurrent operations. Multithreading is the ability of a CPU to execute multiple threads concurrently.

• GCD is used for managing tasks asynchronously and efficiently utilizing system resources.

• Multithreading allows multiple tasks to run concurrently, improving performance and responsiveness of an application.

• Example: Using GCD to download image...read more

Objective-C is the older language used for iOS development, while Swift is the newer, more modern language.

• Objective-C is a superset of C with Smalltalk-style messaging syntax.

• Swift is more concise and easier to read than Objective-C.

• Swift is safer due to its optionals and type interference features.

• Objective-C has been around longer and has a larger codebase, but Swift is becoming more popular.

• Many developers prefer S...read more