Swift skill quiz for certificate: Boost Resume and LinkedIn Profile

Enhance your career with our free Swift skill Quiz. Perfect for boosting your resume and LinkedIn profile, this comprehensive quiz covers essential Swift iOS app Development skills.

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Swift Skill Exam

1 / 20

1. Which design pattern is commonly used to handle the navigation flow between screens in iOS apps?

Option: Singleton

Option: Observer

Option: Coordinator

Option: Factory

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2 / 20

2. Which of the following is NOT a valid way to create a Combine publisher in Swift?

Option: `Just`

Option: `Future`

Option: `Deferred`

Option: `Empty`

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3. What is the purpose of the `@StateObject` property wrapper in SwiftUI?

Option: To inject an object into the environment

Option: To create a binding to a state variable

Option: To create a reference object that is owned by the view and persists across updates

Option: To observe changes to an object owned by an external source

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4 / 20

4. What is the difference between `let` and `var` when declaring properties in Swift?

Option: `let` declares a constant, while `var` declares a variable.

Option: `let` declares a variable, while `var` declares a constant.

Option: `let` is used for reference types, while `var` is used for value types.

Option: There is no difference; they are interchangeable.

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5 / 20

5. Which of the following is NOT a valid SwiftUI view modifier?

Option: `.padding()`

Option: `.font()`

Option: `.background()`

Option: `.transform()`

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6 / 20

6. Which framework provides APIs for interacting with the HealthKit data store in iOS?

Option: HealthKitUI

Option: HealthKit

Option: CoreMotion

Option: CloudKit

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7 / 20

7. What is the purpose of the `@Environment` property wrapper in SwiftUI?

Option: To observe changes to an object's properties

Option: To access system-wide settings and preferences within a SwiftUI view

Option: To inject dependencies into a SwiftUI view

Option: To create animations

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8 / 20

8. Which of these is a dependency manager for Swift and Objective-C projects?

Option: npm

Option: pip

Option: CocoaPods

Option: Yarn

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9 / 20

9. Which of these is NOT a valid HTTP method used in RESTful APIs?

Option: GET

Option: POST

Option: PUT

Option: SEND

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10 / 20

10. Which of the following is NOT a common state management approach in SwiftUI?

Option: @State

Option: @ObservedObject

Option: @EnvironmentObject

Option: @AppStorage

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11. What is the purpose of the `@escaping` attribute for a closure in Swift?

Option: To indicate that the closure will be executed immediately

Option: To indicate that the closure may outlive the function it is passed to

Option: To indicate that the closure can only be called once

Option: To indicate that the closure is optional

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12 / 20

12. What is the purpose of a "Combine Scheduler"?

Option: To schedule background tasks

Option: To manage the execution context of a publisher's work

Option: To handle network requests

Option: To store data in memory

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13 / 20

13. Which concurrency pattern is most suitable for tasks that involve waiting for external events, like network requests or user input?

Option: Async/Await

Option: Actors

Option: Tasks

Option: Dispatch Queues

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14 / 20

14. Which of the following is NOT a common way to handle asynchronous operations in Swift?

Option: Completion handlers

Option: Promises

Option: Async/Await

Option: Semaphores

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15. What is the purpose of the `deinit` method in a Swift class?

Option: To initialize the class

Option: To deallocate resources held by the class

Option: To handle user interactions

Option: To perform network requests

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16 / 20

16. Which of the following is NOT a valid way to handle errors in Swift?

Option: Throwing an error using the `throw` keyword

Option: Using a `do-catch` block

Option: Returning an optional value

Option: Ignoring the error

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17 / 20

17. What does the `lazy var` keyword signify in Swift?

Option: The variable is initialized only when first accessed.

Option: The variable is a constant.

Option: The variable is optional.

Option: The variable is computed.

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18 / 20

18. Which property wrapper is used to create a two-way binding between a view and a source of truth in SwiftUI?

Option: `@State`

Option: `@Binding`

Option: `@ObservedObject`

Option: `@EnvironmentObject`

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19 / 20

19. What is the purpose of the `URLSession` class in Swift?

Option: To create and manage network requests

Option: To parse JSON data

Option: To store data in UserDefaults

Option: To manage the app's lifecycle

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20. Which of the following states is NOT part of the standard iOS app lifecycle?

Option: Not running

Option: Inactive

Option: Active

Option: Suspended

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Brief About Swift

Swift is a robust and intuitive programming language created by Apple for building apps for iOS, Mac, Apple TV and Apple Watch. It’s designed to give developers more freedom than ever. Swift is easy to use and open source, so anyone with an idea can create something incredible.

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