Question

which language is used with swiftui?
o a. java
b. kotlin
c. swift
d. objective-c
clear my choice
which phase comes first in the ios app lifecycle?
a. testing
b. deployment
c. idea and planning
d. maintenance
clear my choice
which property wrapper is used for shared global data?
a. @state
b. @observedobject
c. @environmentobject
d. @binding
clear my choice

Explanation:

• First question: SwiftUI is a UI framework developed by Apple, and it is designed to work with the Swift programming language. Java is mainly used for Android development (among other things), Kotlin is also an Android - related language (though it can be used in other contexts too), and Objective - C was the traditional language for iOS development before Swift.
• Second question: In the iOS app lifecycle, the first phase is "Idea and Planning". Without a proper idea and plan, there is no basis for testing, deployment, or maintenance. Testing comes after development (which is based on the idea and planning), deployment is after the app is developed and tested, and maintenance is an ongoing process after the app is deployed.
• Third question:
• @State is used for simple property values that are managed within a single view.
• @ObservedObject is used to observe an object that conforms to the ObservableObject protocol within a view hierarchy.
• @EnvironmentObject is specifically designed for sharing global data throughout the app.
• @Binding is used for two - way data binding between a parent and child view.

Answer:

1. C. Swift
2. C. Idea and Planning
3. C. @EnvironmentObject