iOS Development IOS App Development Fundamentals 2

Question 1

Which framework introduced in 2019 uses a declarative syntax for building iOS user interfaces?

Accepted Answer

SwiftUI

Answer

SwiftUI uses a declarative syntax where you describe what the UI should do rather than how to build it step by step.

Question 2

In Swift, which keyword declares a variable whose value cannot change after assignment?

Accepted Answer

let

Answer

The 'let' keyword declares an immutable constant in Swift, while 'var' declares a mutable variable.

Question 3

What is the primary purpose of the AppDelegate in a UIKit-based iOS app?

Accepted Answer

Handling app-level lifecycle events

Answer

The AppDelegate responds to application-level lifecycle events such as launch, background, and termination.

Question 4

Which file format is used to manage app configuration and metadata such as bundle identifier and permissions?

Accepted Answer

Info.plist

Answer

Info.plist holds key app configuration including bundle ID, version, and usage permission descriptions.

Question 5

What does Auto Layout primarily enable in an iOS app?

Accepted Answer

Adaptive UI across different screen sizes

Answer

Auto Layout uses constraints to create responsive layouts that adapt to varying device screen sizes and orientations.

iOS Development Practice Test