Hard Mobile App Development Test - 82+ MCQs: Mobile App Development test: Evaluate Your Skills with App Development Questions and Answers

1. What is the purpose of the 'gradle.build' file in Android app development?

To define the app's layout

To manage app dependencies

To handle app navigation

To store user preferences

2. Which method is called when an Android app is resumed from the background?

onResume

onStart

onRestart

onResumeFromBackground

3. Which database is commonly used in mobile app development for offline storage?

MongoDB

SQLite

Firebase

MySQL

4. Which design pattern is commonly used in iOS app development for managing the flow of data?

MVC (Model-View-Controller)

Observer Pattern

Singleton Pattern

Factory Method Pattern

5. Which platform uses Swift as its primary programming language?

Android

iOS

Windows

Cross-platform

6. Which technique is commonly used for securing local storage in mobile apps?

Biometric Authentication

Data Encryption

JWT (JSON Web Tokens)

Firebase Authentication

7. Which architecture pattern is commonly used in Android app development for large-scale projects?

MVC (Model-View-Controller)

MVVM (Model-View-ViewModel)

Clean Architecture

Singleton Pattern

8. Which IDE (Integrated Development Environment) is commonly used for Android app development?

Xcode

Visual Studio Code

Eclipse

Android Studio

9. What is the purpose of the 'ContentResolver' in Android app development?

To manage app permissions

To handle background tasks

To perform database operations

To interact with content providers

10. What is the purpose of the 'SharedPreferences' in Android app development?

To store user preferences

To manage app resources

To handle app navigation

To control the app's lifecycle

11. In iOS app development, what is the purpose of the 'DispatchQueue'?

To manage app permissions

To handle user interactions

To perform background tasks concurrently

To define the app's layout

12. Which database is commonly used for real-time synchronization in mobile app development?

Realm

SQLite

Firebase Realtime Database

Core Data

13. What is the purpose of the 'Core Data' framework in iOS app development?

To manage app resources

To store user preferences

To handle app permissions

To perform data persistence

14. Which programming language is commonly used for iOS app development?

Java

Swift

Kotlin

Objective-C

15. What is the purpose of the 'strings.xml' file in Android app development?

To define the app's layout

To store user preferences

To manage app resources

To handle server communication

16. Which tool is commonly used for managing state in React Native app development?

Redux

RxJava

SQLite

Core Data

17. In iOS app development, what is the purpose of the 'Combine' framework?

To optimize UI rendering

To perform background tasks

To handle app navigation

To manage asynchronous events with reactive programming

18. What is the purpose of the 'useState' hook in React Native?

To handle app navigation

To store UI-related data

To perform asynchronous tasks

To manage app permissions

19. What is the primary purpose of the 'React Navigation' library in React Native?

To perform background tasks

To handle app permissions

To optimize UI rendering

To facilitate navigation between screens

20. Which file format is used for storing vector graphics in Android?

PNG

SVG

JPEG

GIF

21. What is the purpose of the 'AppDelegate.swift' file in iOS app development?

To manage app permissions

To handle push notifications

To define the app's layout

To control the app's lifecycle

22. Which file is used to specify app permissions in Android?

permissions.plist

permissions.xml

AndroidManifest.xml

app.permissions

23. Which method is used for handling user authentication in Firebase for Android apps?

authUser()

authenticate()

signInUser()

signInWithEmailAndPassword()

24. What is the purpose of the 'AsyncTask' class in Android app development?

To perform background tasks

To handle app permissions

To define the app's layout

To manage app dependencies

25. Which method is called when a Flutter widget is being disposed of?

dispose()

onDispose()

destroy()

release()

26. Which programming language is commonly used for Android app development?

Swift

Java

Objective-C

Kotlin

27. In React Native app development, what is the purpose of the 'Hermes' engine?

To optimize UI rendering

To manage app resources

To perform background tasks

To enhance JavaScript execution

28. In iOS app development, what is the purpose of the 'Core ML' framework?

To handle app permissions

To perform background tasks

To optimize UI rendering

To integrate machine learning models into apps

29. Which file is responsible for defining the app's icon in Android?

icon.xml

app.icon

res/icon.png

AndroidManifest.xml

30. Which lifecycle method is called when an iOS app enters the background?

viewDidLoad

onPause

applicationDidEnterBackground

onDestroy

31. Which security measure is crucial for protecting data transmitted between a mobile app and a server?

Firebase Authentication

JWT (JSON Web Tokens)

SSL/TLS Encryption

OAuth 2.0

32. What is the purpose of the 'res' folder in Android app development?

To store app icons

To manage app permissions

To define the app's structure

To store app resources

33. Which programming language is commonly used for cross-platform mobile app development?

Java

Swift

Kotlin

Flutter

34. What is the purpose of an XML file in mobile app development?

To define the app's layout

To store user preferences

To manage app permissions

To handle server communication

35. What is the purpose of the 'AppDelegate.h' file in iOS app development?

To control the app's lifecycle

To handle background tasks

To define the app's layout

To manage app permissions

36. What is the significance of 'Proguard' in Android app development?

To optimize app performance

To obfuscate and shrink code for security

To handle app permissions

To facilitate communication between components

37. In mobile app development, what is the significance of 'OAuth 2.0' for authentication?

To handle app permissions

To optimize database performance

To secure user credentials with token-based authentication

To manage app resources

38. What is the purpose of the 'NotificationCenter' in iOS app development?

To manage app permissions

To handle user interactions

To handle push notifications

To facilitate communication between components

39. Which method is used for making API requests in React Native?

fetch()

axios()

http()

request()

40. What is the main function of a storyboard in mobile app development?

To create animations

To design the app's user interface

To manage app resources

To handle background tasks

41. Which component is responsible for handling user interactions in a mobile app?

Activity

Service

BroadcastReceiver

ContentProvider

42. What is the purpose of the 'styles.xml' file in Android app development?

To define the app's layout

To manage app resources

To store user preferences

To handle server communication

43. What is the purpose of the 'Main.storyboard' file in iOS app development?

To design the app's user interface

To handle background tasks

To manage app resources

To create animations

44. In Flutter app development, what is the purpose of the 'Bloc' pattern?

To handle app navigation

To manage state and logic in a reactive way

To perform animations

To optimize UI rendering

45. What is the purpose of the 'Dagger' library in Android app development?

To perform dependency injection

To handle app permissions

To manage state and logic

To facilitate communication between components

46. What is the purpose of the 'Reactive Programming' paradigm in mobile app development?

To simplify user interfaces

To handle asynchronous events with observable sequences

To improve app security

To optimize database performance

47. Which programming language is commonly used for backend development in mobile apps?

JavaScript

Java

Swift

Python

48. What is the purpose of the 'MotionLayout' in Android app development?

To optimize UI rendering

To manage state and logic

To coordinate complex motion and widget animation

To handle app navigation

49. Which architecture pattern is commonly used in Flutter app development?

MVC (Model-View-Controller)

MVVM (Model-View-ViewModel)

Observer Pattern

Singleton Pattern

50. What is the purpose of the 'AndroidViewModel' class in Android app development?

To handle user interactions

To manage app resources

To store UI-related data

To control the app's lifecycle

Mobile App Development MCQ Test 1