Swift Programming Interview Questions and Answers

Swift Programming Interview Questions and Answers

Swift is Apple’s new language option for programming native iOS applications. Swift is an amazing programming language that has been built from the ground up to be efficient and safe. It uses the same APIs that Objective-C does. Or, what you can do in Objective-C, you can do in Swift. Swift is a general-purpose (or) compiled programming language developed by Apple Inc. for iOS, macOS, watchOS, tvOS, and Linux. Swift is designed to work with Apple’s Cocoa and Cocoa Touch frameworks and the large body of existing Objective-C (ObjC) code written for Apple products. It is built with the open source LLVM compiler framework and has been included in Xcode since version 6. On platforms other than Linux, it uses the Objective-C runtime library which allows C, Objective-C, C++ and Swift code to run within one program.

Swift is friendly to new programmers. It’s an industrial-quality programming language that’s as expressive and enjoyable as a scripting language. Writing Swift code in a playground lets you experiment with code and see the results immediately, without the overhead of building and running an app.

Swift defines away large classes of common programming errors by adopting modern programming patterns:

Memory is managed automatically.

Variables are always initialized before use.

Array indices are checked for out-of-bounds errors.

Integers are checked for overflow.

Optional ensure that nil values are handled explicitly.

Error handling allows controlled recovery from unexpected failures.

Swift some main versions and also sub versions are released:

  • Swift was introduced at Apple’s 2014 Worldwide Developers Conference (WWDC).
  • Swift 1.1 was released on October 22, 2014
  • Swift 1.2 was released on April 8, 2015
  • Swift 2.0 was released on September 21, 2015
  • Swift 3.0 was released on September 13, 2016
  • Swift 4.0 was released on September 19, 2017
  • Current version is Swift 4.1.2 was released on May 31.2018

What is swift programming?

Why swift?

What are the features of Swift Programming language?

What is the difference between Swift language and Objective-C language?

Write a basic program in Swift to print “My name is jack

What is the difference between functions and methods in Swift?

How to convert NSArray to NSMutableArray in swift programming?

What are the type of integers does Swift language have?

What is de-initializer and how it is written in Swift language?

What is the question mark (? )in Swift language?

What are optional binding and optional chaining in Swift?

What is the syntax for external parameters?

What are the Tokens in Swift programming?

What is the different between let and var in swift?

What is Typecasting in swift?

What is error handling? How should one handle errors in Swift?

What are the collection types in Swift?

What is the use of exclamation mark ! in Swift?

What is type aliasing in Swift language?

What is a guard statement in Swift language?

What is the use of enumerate () function in Swift array?

How to convert Swift String into an Array?

What is ARC in Swift language?

What is the Closures in Swift?

What are control flow statements in swift?

Why a compile time error occurs. How can you fix it?

What is the use of hasPrefix(prefix: String) function in Swift?

What are the types of built-in data types available in Swift language?

What is the use of fallthrough statement in Swift language?

What is Lazy stored properties in swift? And when it is useful?

What are the generics in swift?

Explain inheritance in swift?

How multiple line comment can be written in swift?

What are the collection types available in Swift with example?

What are the properties’ in swift?

What is Enumerations in Swift?