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

A SwiftUI app's structure is defined by an App struct annotated with @main.

Question 2

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

Accepted Answer

Stores app configuration and metadata

Answer

Info.plist stores key configuration values and metadata about the app.

Question 3

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

Accepted Answer

URLSession

Answer

URLSession is the standard API for making network requests in iOS.

Question 4

What is a closure in Swift?

Accepted Answer

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

Answer

A closure is a self-contained block of functionality that can be passed and used in code.

Question 5

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

Accepted Answer

Canvas / Previews

Answer

Xcode's Canvas shows live SwiftUI previews that update as you edit code.

iOS Development Practice Test