iOS Development IOS App Developer 5

Question 1

What does the await keyword do at a call site in Swift concurrency?

Accepted Answer

Marks a potential suspension point

Answer

Blocks the entire app

Answer

Creates a new thread

Answer

Caches the result

Question 2

Which protocol must a type conform to so SwiftUI's ForEach can uniquely identify its items without an explicit id?

Accepted Answer

Identifiable

Answer

Equatable

Answer

Comparable

Answer

CaseIterable

Question 3

What is the role of GeometryReader in SwiftUI?

Accepted Answer

To access the size and coordinate space of its container

Answer

To read device sensors

Answer

To parse JSON

Answer

To manage navigation

Question 4

Which approach should you use to schedule repeated background work like data refresh on iOS?

Accepted Answer

BackgroundTasks framework

Answer

A while loop on the main thread

Answer

Timer with sleep

Answer

Blocking URLSession

Question 5

What is the purpose of a delegate pattern in UIKit?

Accepted Answer

To allow one object to act on behalf of, or respond to, another

Answer

To store global constants

Answer

To compile faster

Answer

To render Metal graphics

Question 6

Which tool distributes beta builds of an iOS app to testers before App Store release?

Accepted Answer

TestFlight

Answer

Xcode Cloud

Answer

Swift Package Manager

Answer

CocoaPods

Question 7

In Swift, what does the guard statement primarily help with?

Accepted Answer

Early exit when a condition is not met

Answer

Looping over collections

Answer

Defining computed properties

Answer

Declaring constants