Quiz | Croma Campus

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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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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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 SceneDelegate in iOS 13 and later?

Manage app's life cycle
Handle background tasks
Manage scene-specific life cycle
Handle app settings

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Which keyword is used to define an enumeration in Swift?

class
struct
enum
type

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

UIApplication
UIAppController
AppDelegate
AppController

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Which keyword is used to declare constants in Swift?

let
var
const
static

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How do you declare a dictionary in Swift?

var dict = ["key": "value"]
var dict = {"key": "value"}
var dict = (key: value)
var dict = [key, value]

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What is the primary programming language used for iOS development?

Java
Kotlin
Swift
Python

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Which method is called when an app receives a memory warning?

didReceiveMemoryWarning
memoryWarningReceived
handleMemoryWarning
onMemoryWarning

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What is the entry point of an iOS application?

Main.storyboard
AppDelegate
ViewController
SceneDelegate

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What is the root class of most UIKit classes?

UIView
UIResponder
NSView
UIObject

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Which of these is used to capture touch events in iOS?

UITapGestureRecognizer
UITouch
UIGestureRecognizer
UICapture

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Which framework is primarily used for handling data persistence in iOS apps?

Core Data
Room
SQLite
Core Storage

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Which method is used to add a subview to a view in UIKit?

addSubView
appendView
insertSubView
addSubview

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How do you declare a variable in Swift?

var x = 10
let x = 10
int x = 10
var int x = 10

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What is the primary design pattern used in iOS development?

Singleton
Observer
MVC
MVVM

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

Maven
Gradle
CocoaPods
npm

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How do you define a function in Swift?

def myFunction() {}
func myFunction() {}
function myFunction() {}
function() myFunction {}

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

dismiss
remove
pop
close

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What is used to handle background tasks in iOS?

NSBackground
BGTask
BackgroundWorker
URLSession

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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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What keyword is used to create a new instance of a class in Swift?

create
new
instantiate
init

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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 protocol is used for table view data sources?

UITableViewDataSource
UITableViewDelegate
UITableViewSource
UITableViewHandler

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