iOS Development IOS App Development Fundamentals 3

Question 1

Which property wrapper creates a source of truth for mutable state owned by a SwiftUI view?

Accepted Answer

@State

Answer

@State manages local, view-owned mutable state and triggers view updates when changed.

Question 2

What is the recommended language for new iOS development by Apple?

Accepted Answer

Swift

Answer

Swift is Apple's modern, type-safe language and the recommended choice for new iOS apps.

Question 3

Which IDE is used to develop, build, and submit iOS apps?

Accepted Answer

Xcode

Answer

Xcode is Apple's official integrated development environment for building and submitting iOS apps.

Question 4

What does a closure capture when it references variables from its surrounding scope?

Accepted Answer

References to those variables (a capture list controls semantics)

Answer

Closures capture references to variables in their surrounding context, and capture lists let you control strong/weak capture.

Question 5

Which design pattern does UIKit heavily rely on for view controller communication?

Accepted Answer

Delegation

Answer

Delegation lets one object act on behalf of, or in coordination with, another via a protocol.

iOS Development Practice Test