Prepare for Your Swift Interview with These Questions and Answers

Swift Interview Questions and Answers

1. What is the difference between Swift and Objective-C?
The biggest difference between Swift and Objective-C is that Swift is a modern language, designed from the ground up for safety, performance, and software design. It has a simpler syntax, type inference, generics, and features like optionals and closures. Objective-C offers more flexibility in code but requires more manual memory management and is tied to Apple's legacy Cocoa APIs.

2. What is the purpose of Swift language?
The purpose of the Swift language is to make writing and maintaining code easier and faster. Apple designed Swift to be easier to read and write, safer than Objective-C, and more powerful. Swift eliminates entire categories of common programming errors and provides modern language features that make code writing more expressive and efficient.

3. What are the data types supported by Swift?
Swift supports the typical primitive data types such as Int, Float, Double, Bool, and String. Additionally, it also supports advanced data types such as Arrays, Sets, Tuples, and Dictionaries.

4. What is the differences between let and var in Swift?
The differences between let and var in Swift is that let is used to declare constants, while var is used to declare variables. Constants declared using let cannot be changed, while variables declared with var can be changed throughout the life of the program.

5. What are the benefits of using Swift?
The benefits of using Swift are numerous. Swift was designed to make development faster and easier while maintaining high standards for safety and performance. Its concise and expressive syntax makes development faster, while its type inference and generics help developers to create more robust apps with fewer errors. On top of that, its focus on safety means that developers can be confident that their apps will run correctly in all circumstances.