1. A unique iOS app identifier such as com.university.campusapp is the:
- Provisioning profile
- Team ID
- Device UDID
- Bundle identifier
Answer: D) Bundle identifier
Explanation: The bundle ID uniquely identifies an app, like applicationId on Android.
MCQs / Computer Science / iOS: Architecture and Framework
iOS: Architecture and Framework MCQs — Computer Science
47 multiple-choice questions on iOS: Architecture and Framework from Computer Science, each with the correct answer and, where available, a teacher's explanation. Read through them to revise the chapter, then practise the same questions one by one to test yourself.
2. iOS was first introduced with the original iPhone in:
- 2007
- 2011
- 2009
- 2005
Answer: A) 2007
Explanation: Steve Jobs introduced the iPhone and iPhone OS in January 2007.
3. The iOS file that is similar to Android's AndroidManifest.xml is:
- Info.plist
- AppDelegate.swift
- Assets.xcassets
- Main.storyboard
Answer: A) Info.plist
Explanation: Info.plist holds app configuration and permission descriptions.
4. Beta testing iOS apps with external testers is done through:
- Google Play Console
- Xcode Playgrounds
- Firebase Hosting
- TestFlight
Answer: D) TestFlight
Explanation: TestFlight distributes beta builds to testers.
5. The design pattern traditionally used by UIKit apps is:
- MVC
- Client–server
- Singleton only
- MVP only
Answer: A) MVC
Explanation: Apple's UIKit apps are built around Model–View–Controller.
6. UINavigationController manages screens as a:
- Stack (push and pop)
- Queue
- Tree only
- Grid
Answer: A) Stack (push and pop)
Explanation: It pushes and pops view controllers on a navigation stack.
7. Code signing for iOS uses certificates and:
- AndroidManifest files
- Provisioning profiles
- Gradle keys
- APK signatures
Answer: B) Provisioning profiles
Explanation: Provisioning profiles tie the certificate, app ID and allowed devices together.
8. Which iOS framework gives access to GPS location?
- AVFoundation
- Core Graphics
- StoreKit
- Core Location
Answer: D) Core Location
Explanation: Core Location provides location and heading information.
9. Core Animation, Metal and AVFoundation belong to the:
- Core Services layer
- Core OS layer
- Media layer
- Cocoa Touch layer
Answer: C) Media layer
Explanation: The Media layer handles graphics, audio and video.
10. Which is TRUE about iOS compared with Android?
- iOS has low fragmentation because only Apple makes iPhones
- iOS is open source
- iOS runs on many manufacturers' phones
- iOS apps are written in Kotlin
Answer: A) iOS has low fragmentation because only Apple makes iPhones
Explanation: Apple controls both hardware and software, so there are few device variations.
11. UIKit belongs to which iOS layer?
- Cocoa Touch
- Core Services
- Media
- Core OS
Answer: A) Cocoa Touch
Explanation: UIKit is the main Cocoa Touch framework for UI and events.
12. The operating system for iPad, separated from iOS in 2019, is:
- padOS
- iOS Tablet
- iPadOS
- macOS Lite
Answer: C) iPadOS
Explanation: iPadOS was introduced in 2019.
13. An app that is in memory but not executing any code is in which state?
- Background
- Active
- Inactive
- Suspended
Answer: D) Suspended
Explanation: Suspended apps stay in memory without running and may be purged.
14. To ask for camera permission, an iOS app must include in Info.plist:
- android.permission.CAMERA
- NSCameraUsageDescription
- UIRequiresCamera
- CameraEnabled = YES
Answer: B) NSCameraUsageDescription
Explanation: Privacy usage keys provide the message shown to the user.
15. Core Data, Foundation and Core Location are part of the:
- Media layer
- Core Services layer
- Core OS layer
- Cocoa Touch layer
Answer: B) Core Services layer
Explanation: These are fundamental system services.
16. Which framework provides high-performance 3-D graphics and GPU computing on iOS?
- Core Text
- MapKit
- UIKit
- Metal
Answer: D) Metal
Explanation: Metal is Apple's low-level graphics and compute API.
17. Which is the LOWEST layer of the iOS architecture?
- Core OS
- Core Services
- Media
- Cocoa Touch
Answer: A) Core OS
Explanation: Core OS sits closest to the hardware.
18. Swift Optionals (e.g. String?) are used to:
- Import frameworks
- Safely represent a value that may be missing (nil)
- Declare constants
- Make code run faster
Answer: B) Safely represent a value that may be missing (nil)
Explanation: Optionals force developers to handle nil values safely.
19. Which object handles app-level events such as launch in UIKit apps?
- Info.plist
- Storyboard
- ViewController
- AppDelegate
Answer: D) AppDelegate
Explanation: AppDelegate receives application lifecycle events.
20. In-app purchases on iOS are implemented with:
- HealthKit
- StoreKit
- CloudKit
- GameKit
Answer: B) StoreKit
Explanation: StoreKit handles in-app purchases and subscriptions.
21. Starting in 2025, Apple's OS version numbers follow the:
- Chip name
- Year (e.g. iOS 26 released in 2025)
- Swift version
- Device model number
Answer: B) Year (e.g. iOS 26 released in 2025)
Explanation: Apple moved to year-based numbering with iOS 26.
22. Swift was introduced by Apple in:
- 2008
- 2017
- 2020
- 2014
Answer: D) 2014
Explanation: Swift was announced at WWDC 2014.
23. The App Store and official SDK for third-party iOS apps arrived in:
- 2008
- 2014
- 2010
- 2007
Answer: A) 2008
Explanation: iPhone OS 2 in 2008 introduced the App Store and the SDK.
24. SwiftUI was introduced in:
- 2014
- 2022
- 2019
- 2008
Answer: C) 2019
Explanation: SwiftUI was announced at WWDC 2019.
25. App metadata, builds and pricing are managed on:
- Xcode Cloud only
- GitHub
- App Store Connect
- Google Play Console
Answer: C) App Store Connect
Explanation: App Store Connect is Apple's portal for managing apps.
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Practise iOS: Architecture and Framework MCQs
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