1. Which stage of the app lifecycle creates wireframes and prototypes?
- Testing
- UI/UX design
- Deployment
- Maintenance
Answer: B) UI/UX design
Explanation: Wireframes, mock-ups and prototypes are produced in the UI/UX design stage.
MCQs / Computer Science / Introduction to Mobile Applications and Platforms
Introduction to Mobile Applications and Platforms MCQs — Computer Science
47 multiple-choice questions on Introduction to Mobile Applications and Platforms 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. Google's preferred language for Android development is:
- Swift
- C
- Kotlin
- Java
Answer: C) Kotlin
Explanation: Since 2019 Google has been "Kotlin-first"; Java is still supported.
3. Flutter apps are written in which language?
- Dart
- Kotlin
- C
- Swift
Answer: A) Dart
Explanation: Flutter (by Google) uses the Dart language.
4. A Progressive Web App (PWA) can work offline because of a:
- Broadcast receiver
- Content provider
- Gradle task
- Service worker
Answer: D) Service worker
Explanation: A service worker is a background script that caches resources so the PWA works offline.
5. Kotlin Multiplatform (KMP) is mainly used to:
- Replace the Linux kernel
- Design icons
- Share Kotlin code (logic and optionally UI) across Android, iOS and other platforms
- Build websites only
Answer: C) Share Kotlin code (logic and optionally UI) across Android, iOS and other platforms
Explanation: KMP shares Kotlin business logic, and with Compose Multiplatform also UI, across platforms.
6. Which sensor is used to detect the orientation/tilt of a phone?
- Fingerprint sensor
- Barometer
- Proximity sensor
- Accelerometer / gyroscope
Answer: D) Accelerometer / gyroscope
Explanation: The accelerometer and gyroscope measure movement and rotation used for orientation.
7. The recommended minimum touch target size in Android design guidelines is about:
- 16 dp
- 48 dp
- 8 dp
- 200 dp
Answer: B) 48 dp
Explanation: Material Design recommends touch targets of at least 48 × 48 dp so fingers can tap them easily.
8. A set of functions and classes that an app calls to use a platform feature such as the camera is called a/an:
- IDE
- OS kernel
- APK
- API
Answer: D) API
Explanation: An Application Programming Interface (API) exposes platform functionality to programs.
9. Which statement about web apps is TRUE?
- One code base runs on any device with a browser
- They must be approved by the App Store
- They always have full access to all sensors
- They cannot be updated
Answer: A) One code base runs on any device with a browser
Explanation: Web apps run in any browser from a single code base and update instantly on the server.
10. An app developed specifically for one platform using its own language and SDK is a:
- Web app
- Native app
- Progressive web app
- Hybrid app
Answer: B) Native app
Explanation: Native apps are built with the platform's own tools, e.g. Kotlin/Java for Android or Swift for iOS.
11. HarmonyOS apps are built with DevEco Studio and are mainly published on:
- Apple App Store
- Google Play
- Microsoft Store
- Huawei AppGallery
Answer: D) Huawei AppGallery
Explanation: Huawei's HarmonyOS apps are distributed through Huawei AppGallery.
12. iOS apps are developed with Xcode, which runs only on:
- macOS
- Linux
- Windows
- Android
Answer: A) macOS
Explanation: Xcode is available only for macOS.
13. The Google Play developer account costs:
- USD 299 per month
- A one-time fee of USD 25
- Nothing at all
- USD 99 per year
Answer: B) A one-time fee of USD 25
Explanation: Google charges a one-time USD 25 registration fee; Apple's program costs USD 99 per year.
14. Which of these is NOT usually a reason businesses build mobile apps?
- Sending notifications to users
- Mobile apps never need updates
- Reaching customers anytime and anywhere
- Using device features like location and camera
Answer: B) Mobile apps never need updates
Explanation: Apps need regular updates for bug fixes and new OS versions; the other options are real reasons.
15. The official IDE for Android app development is:
- Visual Studio
- Xcode
- NetBeans
- Android Studio
Answer: D) Android Studio
Explanation: Android Studio, based on IntelliJ IDEA, is Google's official IDE for Android.
16. Running an app on a virtual device on your computer uses an:
- Emulator (AVD)
- Assembler
- Debug bridge cable
- Interpreter
Answer: A) Emulator (AVD)
Explanation: The Android Emulator runs Android Virtual Devices (AVDs) on the computer.
17. Which file format is used to package an Android app for installation on a device?
- IPA
- APK
- DMG
- EXE
Answer: B) APK
Explanation: An Android Package (APK) is installed on devices; IPA is the iOS package.
18. The build automation tool used by Android Studio is:
- npm
- Make
- Gradle
- Maven only
Answer: C) Gradle
Explanation: Android projects are built with Gradle.
19. Espresso is used for:
- Drawing UI icons
- Automated UI testing of Android apps
- Hosting APIs
- Compiling Kotlin
Answer: B) Automated UI testing of Android apps
Explanation: Espresso is Android's UI testing framework.
20. Apache Cordova and Ionic with Capacitor are frameworks for building:
- Operating systems
- Hybrid apps
- Databases
- Native apps
Answer: B) Hybrid apps
Explanation: Cordova and Ionic/Capacitor package web code into installable hybrid apps.
21. Which of the following is NOT a typical characteristic of mobile devices?
- Many screen sizes
- Unlimited RAM and storage
- Variable network connectivity
- Touch-based input
Answer: B) Unlimited RAM and storage
Explanation: Mobile devices have limited RAM and storage; the other options are true characteristics.
22. Apple's modern language for iOS development is:
- Objective-C
- Dart
- Kotlin
- Swift
Answer: D) Swift
Explanation: Swift was introduced by Apple in 2014 and is the main iOS language today.
23. Android is built on which kernel?
- Linux
- XNU (Darwin)
- Windows NT
- Unix System V
Answer: A) Linux
Explanation: Android uses a modified Linux kernel.
24. React Native apps are mainly written in:
- Objective-C
- JavaScript / TypeScript
- Python
- Dart
Answer: B) JavaScript / TypeScript
Explanation: React Native, by Meta, uses JavaScript or TypeScript and renders real native components.
25. Which component is NOT normally part of a mobile development platform?
- Spreadsheet software
- SDK
- IDE
- Operating system
Answer: A) Spreadsheet software
Explanation: A platform includes OS, language, SDK, IDE and store; spreadsheet software is unrelated.
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Practise Introduction to Mobile Applications and Platforms MCQs
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