Quiz | Croma Campus

What is the root class of most UIKit classes?

UIView
UIResponder
NSView
UIObject

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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 does the ?@IBAction? 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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Which framework is primarily used for handling data persistence in iOS apps?

Core Data
Room
SQLite
Core Storage

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Which of these is a valid way to unwrap an optional in Swift?

if let
try catch
unwrap
guard let

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How do you handle errors in Swift?

try-catch
catch-try
do-try-catch
do-catch

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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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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 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 used to handle background tasks in iOS?

NSBackground
BGTask
BackgroundWorker
URLSession

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Which protocol is used for table view data sources?

UITableViewDataSource
UITableViewDelegate
UITableViewSource
UITableViewHandler

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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 handle asynchronous code in Swift?

async-await
promise-then
dispatch-async
queue-async

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How do you define a function in Swift?

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

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

create
new
instantiate
init

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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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What method is used to remove an observer in NotificationCenter?

removeObserver
deleteObserver
unregisterObserver
clearObserver

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

UITapGestureRecognizer
UITouch
UIGestureRecognizer
UICapture

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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 Core Animation used for in iOS?

Network operations
Data persistence
Animating views
Handling gestures

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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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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 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 tool is used for debugging and analyzing performance in Xcode?

Android Monitor
Instruments
Debug Console
Logcat

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Which method is used to animate views in UIKit?

animate
performAnimation
UIView.animate
UIView.performAnimation

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