Quiz | Croma Campus

Which class represents the app?s main event loop and high-level app behaviors?

UIApplication
UIAppController
AppDelegate
AppController

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What is the purpose of a storyboard in iOS development?

Define the app's UI and navigation
Manage app resources
Store user data
Log errors

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What does the ?@IBOutlet? keyword indicate in Swift?

A function that handles an event
A variable that can be used in Interface Builder
A constant value
A function that handles touch events

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What is a closure in Swift?

A type of array
A reference to a function
An anonymous function
A type of constant

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Which of the following is a dependency manager for iOS projects?

Maven
Gradle
CocoaPods
npm

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Which method is called when a table view cell is about to be displayed?

cellForRowAt
willDisplayCell
cellWillAppear
tableViewCellWillAppear

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What is the default layout model in UIKit?

Linear Layout
Grid Layout
Auto Layout
Constraint Layout

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Which framework would you use for drawing 2D graphics in iOS?

Core Data
Core Graphics
Metal
SpriteKit

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What is the file extension for a Swift source file?

.java
.kt
.swift
.py

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What is the purpose of the 'defer' statement in Swift?

Execute code before a loop
Execute code after a loop
Execute code just before the function returns
Execute code when an error occurs

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What is the primary programming language used for iOS development?

Java
Kotlin
Swift
Python

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How do you declare an array in Swift?

var arr = [1, 2, 3]
var arr = {1, 2, 3}
var arr = (1, 2, 3)
var arr = [1; 2; 3]

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Which of the following methods is called when a view is about to appear on the screen?

viewDidLoad
viewWillAppear
viewDidAppear
viewWillDisappear

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Which of these is used to manage memory in Swift?

Automatic Reference Counting
Garbage Collection
Memory Management
Reference Counting

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How do you create a computed property in Swift?

var computedProperty: Int { return 1 }
let computedProperty: Int { return 1 }
computed computedProperty: Int { return 1 }
def computedProperty: Int { return 1 }

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What is the purpose of the ?lazy? keyword in Swift?

Declare a variable that is computed only once
Declare a variable that can be nil
Declare a variable that is mutable
Declare a variable that is immutable

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Which type is used to represent text in Swift?

String
str
text
Txt

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Which keyword is used to declare constants in Swift?

let
var
const
static

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What does the '?' operator signify in Swift?

Optional
Constant
Variable
Closure

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How do you declare a protocol in Swift?

protocol MyProtocol {}
interface MyProtocol {}
type MyProtocol {}
struct MyProtocol {}

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Which method is used to dismiss a modal view controller in iOS?

dismiss
remove
pop
close

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What is the root class of most UIKit classes?

UIView
UIResponder
NSView
UIObject

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What is Core Animation used for in iOS?

Network operations
Data persistence
Animating views
Handling gestures

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What is the name of Apple?s IDE for iOS development?

IntelliJ IDEA
Xcode
Android Studio
Visual Studio

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What method is used to remove an observer in NotificationCenter?

removeObserver
deleteObserver
unregisterObserver
clearObserver

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What is the purpose of the ?guard? statement in Swift?

Declare a variable
Ensure a condition is true
Handle errors
Create a loop

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Which tool can be used for managing multiple Xcode versions?

xcode-select
xcode-manager
xcode-switcher
xcode-choose

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Which method is used to animate views in UIKit?

animate
performAnimation
UIView.animate
UIView.performAnimation

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