Mobile android applications MCQs

This comprehensive set of Mobile Android Applications MCQs is designed to cover all essential topics required for success in exams related to Android app development. Focused on key subjects such as Android architecture, user interface design, activity lifecycle, data storage, and application deployment, these MCQs are crafted to help students build a strong foundation in mobile app development concepts.

Who should practice Mobile Android Applications MCQs?

Students preparing for computer science, software engineering, or mobile development courses that include Android app development concepts.
Individuals aiming to strengthen their understanding of Android architecture, components, and the development process.
Candidates preparing for Android certification exams or courses that assess knowledge of Java/Kotlin programming in the context of Android.
Learners interested in mastering user interface design, layouts, and interaction patterns for mobile applications.
Professionals focused on improving their skills in app testing, debugging, and deployment on the Google Play Store.
Suitable for all aspirants seeking to enhance their knowledge and performance in mobile Android applications for academic or professional success.

1. What programming language is primarily used for Android app development?

A) Java
B) Python
C) C++
D) Swift

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2. Which component is used to display a user interface in Android?

A) Activity
B) Service
C) Broadcast Receiver
D) Content Provider

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3. What is the purpose of the AndroidManifest.xml file?

A) To define the layout of the app
B) To manage the app’s permissions and components
C) To store app resources
D) To configure the database

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4. Which Android component is used for background processing?

A) Activity
B) Fragment
C) Service
D) View

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5. What is an Intent in Android?

A) A user interface component
B) A messaging object used to request an action
C) A layout resource
D) A type of database

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6. Which of the following is used to store data in a structured format in Android?

A) Shared Preferences
B) SQLite Database
C) Internal Storage
D) External Storage

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7. What is the primary function of the Android Debug Bridge (ADB)?

A) To compile Android applications
B) To debug Android applications and manage devices
C) To create user interfaces
D) To optimize app performance

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8. Which layout allows for flexible positioning of child views in Android?

A) LinearLayout
B) RelativeLayout
C) ConstraintLayout
D) FrameLayout

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9. What is a Fragment in Android development?

A) A small part of an activity that can be reused
B) A full-screen component
C) A type of service
D) A layout resource

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10. Which method is called when an Activity is first created?

A) onStart()
B) onResume()
C) onCreate()
D) onPause()

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11. What is the purpose of the Gradle build system in Android?

A) To design user interfaces
B) To compile and build the application
C) To manage app permissions
D) To create databases

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12. Which of the following is NOT an Android lifecycle method?

A) onCreate()
B) onPause()
C) onDestroy()
D) onFinish()

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13. What does the term “API level” refer to in Android?

A) The version of the Android OS
B) The size of the application
C) The complexity of the app’s code
D) The number of features in an app

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14. Which of the following is used to manage application resources?

A) Assets folder
B) Drawable folder
C) Resource folder
D) Both A and B

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15. Which component is responsible for handling user interactions in Android?

A) Activity
B) Service
C) Broadcast Receiver
D) Content Provider

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16. Which of the following is a way to access network data in Android?

A) HTTPURLConnection
B) Sockets
C) RESTful APIs
D) All of the above

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17. What is the function of the ViewHolder pattern in Android?

A) To manage memory
B) To optimize list view performance
C) To create activities
D) To handle database connections

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18. Which method is used to start a new Activity?

A) startActivity()
B) newActivity()
C) launchActivity()
D) openActivity()

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19. What is the use of the ‘Context’ in Android?

A) To manage application resources
B) To provide access to application-specific resources and classes
C) To create user interfaces
D) Both A and B

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20. Which layout is best for a simple vertical list of items?

A) ConstraintLayout
B) LinearLayout
C) GridLayout
D) RelativeLayout

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21. What is the purpose of the RecyclerView in Android?

A) To display a collection of items in a list format
B) To create new Activities
C) To manage app settings
D) To handle background tasks

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22. What does the term “content provider” refer to in Android?

A) A component that allows apps to share data
B) A method to connect to the internet
C) A layout type
D) A service for background tasks

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23. Which of the following is a standard library for Android UI development?

A) AndroidX
B) jQuery
C) Bootstrap
D) React

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24. What is the function of SharedPreferences in Android?

A) To store small amounts of data persistently
B) To manage user sessions
C) To store large files
D) To share data between applications

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25. What does “Material Design” refer to in Android?

A) A design philosophy for Android apps
B) A programming language
C) A type of database
D) A user interface library

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26. Which class is used for handling asynchronous tasks in Android?

A) AsyncTask
B) BackgroundTask
C) TaskHandler
D) ThreadHandler

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27. What is the main purpose of the onActivityResult() method?

A) To start a new Activity
B) To receive results from another Activity
C) To manage background processes
D) To handle user input

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28. What is an APK file in Android?

A) Application Package File
B) Android Package Kit
C) Application Performance Kit
D) Android Programming File

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29. Which of the following permissions is required to access the device’s camera?

A) READ_EXTERNAL_STORAGE
B) WRITE_EXTERNAL_STORAGE
C) CAMERA
D) ACCESS_FINE_LOCATION

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30. What is the role of the “gradle.properties” file in an Android project?

A) To define the application layout
B) To configure build settings and properties
C) To manage application resources
D) To handle database connections

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31. Which Android architecture component is used for managing UI-related data in a lifecycle-conscious way?

A) ViewModel
B) LiveData
C) Room
D) Repository

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32. What is the purpose of the LiveData class in Android?

A) To store large files
B) To observe changes in data and update the UI automatically
C) To manage permissions
D) To handle background tasks

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33. Which of the following is a database solution for Android apps?

A) Firebase
B) SQLite
C) Realm
D) All of the above

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34. What does the term “proguard” refer to in Android development?

A) A tool for optimizing and obfuscating code
B) A library for handling UI
C) A service for managing data
D) A programming language

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35. Which component in Android is used for displaying notifications?

A) NotificationManager
B) NotificationBuilder
C) AlertDialog
D) Toast

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36. Which of the following is a way to persist data in Android?

A) Using Shared Preferences
B) Using SQLite
C) Using files
D) All of the above

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37. What does the ‘R’ class in Android represent?

A) The resources of the application
B) The runtime permissions
C) The response object
D) The reference object

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38. What is the purpose of a BroadcastReceiver in Android?

A) To send messages between activities
B) To handle broadcast messages from other applications
C) To manage user input
D) To perform background tasks

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39. Which of the following is a common way to implement REST APIs in Android?

A) Retrofit
B) Volley
C) OkHttp
D) All of the above

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40. What is the role of the View class in Android?

A) To represent a user interface element
B) To manage data
C) To handle background tasks
D) To access system resources

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41. Which method is called when a Fragment is first created?

A) onCreate()
B) onAttach()
C) onCreateView()
D) onStart()

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42. What is the purpose of the ConstraintLayout in Android?

A) To provide a flexible layout for complex UIs
B) To display a simple vertical list
C) To manage database connections
D) To create animations

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43. Which of the following allows you to define a UI in XML in Android?

A) Drawable
B) Layout
C) Activity
D) Service

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44. What is the role of the Activity class in Android?

A) To manage the lifecycle of user interface components
B) To perform background operations
C) To handle database connections
D) To manage notifications

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45. What is an “implicit intent” in Android?

A) An intent that specifies the component to handle it
B) An intent that does not specify the target component
C) An intent that is used for background tasks
D) An intent that is used to send messages

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46. Which layout manager is commonly used with RecyclerView?

A) LinearLayoutManager
B) RelativeLayoutManager
C) FrameLayoutManager
D) GridLayoutManager

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47. What does the “apply” method do in Android SharedPreferences?

A) Saves changes asynchronously
B) Saves changes immediately
C) Deletes a preference
D) Reads a preference

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48. Which of the following is NOT a part of the Android SDK?

A) Android Studio
B) AVD Manager
C) Eclipse
D) Android Emulator

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49. What is the significance of the “onPause()” method in an Activity?

A) It indicates that the Activity is in the foreground
B) It is called when the Activity is about to become visible
C) It is called when the Activity is no longer visible
D) It is called when the Activity is created

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50. Which of the following is a key feature of Android?

A) Open-source nature
B) Multitasking support
C) User-friendly interface
D) All of the above

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51. What is the purpose of the “AndroidX” library?

A) To provide support for older Android versions
B) To replace the original Android Support Library
C) To improve app performance
D) To enhance UI design

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52. Which class is used to play audio in Android?

A) MediaPlayer
B) AudioManager
C) SoundPool
D) All of the above

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53. What does “fragment transaction” refer to in Android?

A) The process of creating a new Activity
B) The process of adding, removing, or replacing Fragments
C) The method of handling notifications
D) The process of connecting to a database

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54. Which method is used to retrieve a string from SharedPreferences?

A) getString()
B) getValue()
C) getPref()
D) getShared()

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55. What does “Room” refer to in Android development?

A) A UI design component
B) A library for database management
C) A layout type
D) A service for background processing

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56. Which of the following is a feature of the Android Emulator?

A) It allows testing of apps without a physical device
B) It provides real-time performance metrics
C) It requires a physical device to run
D) It cannot simulate GPS location

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57. What is the purpose of the “setContentView()” method in an Activity?

A) To set the user interface layout
B) To initialize the Activity
C) To handle background tasks
D) To create Fragments

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58. What is a “Toast” in Android?

A) A permanent notification
B) A short message displayed on the screen
C) A background service
D) A layout type

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59. Which permission is required for accessing the device’s location?

A) CAMERA
B) ACCESS_FINE_LOCATION
C) READ_EXTERNAL_STORAGE
D) INTERNET

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60. What is an Android “service”?

A) A component that performs long-running operations in the background
B) A component for managing UI
C) A component for handling user input
D) A component for sending notifications

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61. Which of the following is a tool used for performance monitoring in Android apps?

A) Android Profiler
B) Android Studio
C) AVD Manager
D) Gradle

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62. What does the “getApplicationContext()” method return?

A) The context of the current Activity
B) The context of the entire application
C) The context of the current Service
D) The context of the Fragment

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63. Which method is called when the user leaves an Activity?

A) onPause()
B) onStop()
C) onDestroy()
D) All of the above

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64. What is the main purpose of a “splash screen” in an Android app?

A) To display advertisements
B) To provide a loading screen while the app initializes
C) To showcase app features
D) To manage user sessions

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65. Which of the following is NOT a data storage option in Android?

A) SQLite
B) Firebase
C) NoSQL
D) Shared Preferences

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66. What does “ANR” stand for in Android development?

A) Application Not Responding
B) Android Network Request
C) Activity Not Running
D) App Not Ready

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67. What is the role of the “onCreateView()” method in a Fragment?

A) To create the Fragment instance
B) To create the layout for the Fragment
C) To initialize background tasks
D) To manage user input

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68. Which Android component is used to display a list of items?

A) ListView
B) RecyclerView
C) Both A and B
D) Spinner

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69. What does the “invalidate()” method do in Android?

A) It removes an Activity from memory
B) It forces a view to redraw
C) It stops a background service
D) It resets Shared Preferences

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70. Which of the following is a popular Android app distribution platform?

A) App Store
B) Google Play Store
C) Microsoft Store
D) Amazon Store

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71. What is a “DialogFragment” in Android?

A) A fragment that displays a dialog window
B) A fragment that handles notifications
C) A fragment for managing user input
D) A fragment that contains images

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72. Which layout is best for displaying items in a grid format?

A) LinearLayout
B) GridLayout
C) RelativeLayout
D) FrameLayout

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73. What is the purpose of the “setOnClickListener()” method?

A) To set a background color
B) To handle click events on a view
C) To initialize a Fragment
D) To create a new Activity

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74. Which Android library is used for dependency injection?

A) Retrofit
B) Dagger
C) Glide
D) Picasso

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75. What is a “ViewGroup” in Android?

A) A component that can contain other views
B) A type of database
C) A layout type
D) A service for background processing

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76. What is the primary purpose of the Android Emulator?

A) To run web applications
B) To test apps on a virtual device
C) To manage app resources
D) To compile code

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77. Which method is used to display a Snackbar in Android?

A) showSnackbar()
B) makeSnackbar()
C) Snackbar.make()
D) displaySnackbar()

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78. What is the function of the “getActivity()” method in a Fragment?

A) To retrieve the associated Activity
B) To create a new Activity
C) To access UI components
D) To manage background tasks

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79. What is a “ConstraintSet” in Android?

A) A set of layout constraints for a view
B) A type of data structure
C) A method for managing user input
D) A library for image processing

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80. Which of the following is a lifecycle-aware component in Android?

A) ViewModel
B) Activity
C) Fragment
D) Service

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81. What does the “dp” unit represent in Android layouts?

A) Density-independent Pixels
B) Device Pixels
C) Default Pixels
D) Display Pixels

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82. What is the purpose of the “onCreateOptionsMenu()” method?

A) To create the app’s main layout
B) To inflate the options menu for an Activity
C) To handle click events
D) To manage background tasks

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83. What is the primary use of the “setVisibility()” method?

A) To change the size of a view
B) To show or hide a view
C) To create new views
D) To update the layout

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84. Which class is used to access the phone’s camera in Android?

A) Camera
B) CameraManager
C) Camera2
D) Both B and C

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85. What does “API level” indicate in Android development?

A) The device’s hardware specifications
B) The version of the Android SDK
C) The compatibility of the app with different Android versions
D) The number of APIs available

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86. What is the role of the “RecyclerView.Adapter” class?

A) To create individual view items for RecyclerView
B) To manage the layout of RecyclerView
C) To handle user interactions
D) To manage data storage

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87. Which Android component allows background tasks to run even if the app is not visible?

A) Activity
B) Service
C) BroadcastReceiver
D) ContentProvider

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88. What is the function of the “onConfigurationChanged()” method?

A) To change the screen layout
B) To handle changes in device configuration, like orientation
C) To update the UI
D) To manage background tasks

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89. What is the primary purpose of the “adb logcat” command?

A) To compile the app
B) To display logs from the Android device
C) To start a new Activity
D) To manage database connections

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90. What does “Gradle” do in Android development?

A) Manages dependencies and builds the project
B) Creates user interfaces
C) Handles network requests
D) Manages database connections

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91. Which of the following is a design pattern used in Android?

A) MVC
B) MVVM
C) MVP
D) All of the above

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92. What is the purpose of the “FragmentManager” class?

A) To manage multiple Fragments within an Activity
B) To manage user input
C) To handle notifications
D) To manage background tasks

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93. Which class is used for managing app preferences in Android?

A) PreferenceManager
B) SharedPreferences
C) AppPreferences
D) UserPreferences

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94. What is the primary role of the “ViewModel” class?

A) To handle data for the UI and survive configuration changes
B) To manage background tasks
C) To create user interfaces
D) To handle network requests

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95. Which method is used to start a background service in Android?

A) startService()
B) beginService()
C) launchService()
D) openService()

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96. What is the purpose of the “setResult()” method in an Activity?

A) To set the result of an operation to be returned to the calling Activity
B) To set the layout of the Activity
C) To manage background tasks
D) To create a new Fragment

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97. Which of the following is a key benefit of using “RecyclerView”?

A) Better performance with large datasets
B) Easier layout management
C) Built-in support for animations
D) All of the above

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98. What does the “inflate()” method do in Android?

A) Creates a new Activity
B) Converts XML layout files into View objects
C) Initializes Shared Preferences
D) Handles background tasks

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99. Which class is used to access network data in Android?

A) NetworkManager
B) HttpURLConnection
C) ConnectivityManager
D) All of the above

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100. What is the significance of the “minSdkVersion” in the build.gradle file?

A) It specifies the minimum Android version required to run the app
B) It determines the maximum Android version the app can support
C) It defines the app’s target audience
D) It indicates the size of the app

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