Jan 20iOS Interview questions and answers Part13131.What is the difference Non-Escaping and Escaping Closures ? The lifecycle of a non-escaping closure is simple: Pass a closure into a function The function runs the closure (or not) The function returns Escaping closure means, inside the function, you can still run the closure (or not); the extra bit…Xcode15 min readXcode15 min read
Jan 20iOS Interview questions and answers Part12121.What is Property? Swift 4 language provides properties for class, enumeration or structure to associate values. Properties can be further classified into Stored properties and Computed properties. Difference between Stored Properties and Computed Properties Stored Property Computed Property Store constant and variable values as instance Calculate a value rather than…Swift7 min readSwift7 min read
Jan 28, 2022iOS Interview questions and answers Part11111.Operations, Operation Queue and Grand Central Dispatch synchronous versus asynchronous connections. asynchronous: NSOperation is an OOP abstraction on top of GCD that allows you to do more sophisticated async operations, but everything you could achieve with NSOperations you could do with GCD. …Swift14 min readSwift14 min read
Jan 10, 2022iOS Interview questions and answers Part10101.Explain and show examples of SOLID principles? SOLID principles are relatively old but incredibly useful concepts to apply to any OOP codebase in any language. SOLID stands for Single Responsibility Principle, Open/Closed Principle, Liskov Substitution Principle, Interface Segregation Principle, and Dependency Inversion Principle. These principles feed into and support each…Swift8 min readSwift8 min read
Nov 15, 2021iOS Interview Questions Part 9Intelegain Technology iOS Interview Questions Location : Turbhe Date : September, 2018 What is difference between datasource and delegates? What are methods of Uitableviewdelegate and Uitableviewdatasource? Which design pattern you are using? What are MVC? What are persistent storage in iOS? What is difference between coredata and sqlite? Have you…Objective C5 min readObjective C5 min read
Oct 22, 2021iOS Interview questions and answers Part890-What’s your preference when writing UI’s, Xib files, Storyboards or programmatic UIView? There’s no right or wrong answer to this, but it’s great way of seeing if you understand the benefits and challenges with each approach. Here’s the common answers I hear: • Storyboard’s and Xib’s are great for quickly…Objective C14 min readObjective C14 min read
Oct 22, 2021iOS Interview questions and answers Part778-What will be the output for below code. var name1:String! override func viewDidLoad() { let obj=name1!.count print(obj as Any) super.viewDidLoad() // Do any additional setup after loading the view. } App will crash because of accessing nil value 79-What is the difference Stack and Heap ? Our code takes up…Swift8 min readSwift8 min read
Sep 16, 2021iOS Interview Questions and Answers Part 6iOS Interview Questions and Answers Part 6 63-What is the navigation controller and split view controller? Navigation controller contains the stack of controllers every navigation controller must be having root view controller by default these controllers contain 2 method (a) push view (b) pop view By default navigation controller contain “table view”. split view controller is used…Objective C16 min readObjective C16 min read
Sep 1, 2021iOS Interview questions and answers Part552-Define property, synthesised and instance variable? Property/Instance:A property is a more abstract concept. An instance variable is literally just a storage slot, like a slot in a struct. Normally other objects are never supposed to access them directly. Usually a property will return or set an instance variable, but it…I OS9 min readI OS9 min read
Sep 1, 2021iOS Interview questions and answers Part437-Consider the following code: var array1 = [1, 2, 3, 4, 5] var array2 = array1 array2.append(6) var len = array1.count What’s the value of the len variable, and why? Answer:The len variable is equal to 5, meaning that array1 has 5 elements, whereas array2 has 6 elements: array1 =…I OS17 min readI OS17 min read
