iOS Development For Beginners 5

Question 1

What is the entry point file that defines an app's overall structure in a SwiftUI project?

Accepted Answer

The App struct marked with @main

Answer

AppDelegate.m

Answer

Main.storyboard

Answer

Info.plist

Question 2

What is the purpose of the Info.plist file in an iOS app?

Accepted Answer

Stores app configuration and metadata

Answer

Contains the app's source code

Answer

Holds user passwords

Answer

Renders the UI

Question 3

Which Apple framework handles networking tasks like downloading data over HTTP?

Accepted Answer

URLSession

Answer

CoreGraphics

Answer

AVFoundation

Answer

MapKit

Question 4

What is a closure in Swift?

Accepted Answer

A self-contained block of code that can be passed around

Answer

A way to close an app

Answer

A type of class

Answer

A database connection

Question 5

Which Xcode feature lets you preview SwiftUI layouts live as you code?

Accepted Answer

Canvas / Previews

Answer

Instruments

Answer

Console

Answer

Organizer

Question 6

What does the Model-View-Controller (MVC) pattern's 'Model' represent?

Accepted Answer

The app's data and business logic

Answer

The visual interface

Answer

User tap events

Answer

The network layer only

Question 7

Which tool in Xcode is used to profile performance and detect memory leaks?

Accepted Answer

Instruments

Answer

Simulator

Answer

Interface Builder

Answer

Asset Catalog