Android Studio - 30 - MVVM Architecture in Android MCQ

Android Studio – 30 – MVVM Architecture in Android

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1. What does MVVM stand for in Android development?

A virtual reality device

A type of emulator

Model-View-ViewModel

A programming language

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2. What is the primary goal of MVVM architecture?

To manage project files and folders

To create user interfaces for the app

To define the root URL for all API requests

To separate concerns and improve app architecture

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3. What is the Model in MVVM architecture?

The data and business logic of the app

A virtual reality device

A type of emulator

A programming language

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4. What is the View in MVVM architecture?

A programming language

A virtual reality device

The user interface components of the app

A type of emulator

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5. What is the ViewModel in MVVM architecture?

A type of emulator

A component that acts as an intermediary between Model and View

A programming language

A virtual reality device

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6. How does the ViewModel communicate with the View in MVVM?

By shaking the emulator's window

By specifying it in the AndroidManifest.xml file

By directly updating UI components

By using data binding or LiveData

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7. What is the primary purpose of LiveData in MVVM architecture?

A type of emulator

A programming language

To provide observable data to the UI

A virtual reality device

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8. How can you observe LiveData in an Android app?

By using the "Observe" method

By shaking the emulator's window

By specifying it in the AndroidManifest.xml file

By manually polling for data changes

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9. What is the role of data binding in MVVM architecture?

A programming language

To establish a connection between UI components and data

A virtual reality device

A type of emulator

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10. How can you enable data binding in an Android Studio project?

By shaking the emulator's window

By using the "Enable Data Binding" option

By specifying it in the AndroidManifest.xml file

By adding the "dataBinding" element to the build.gradle file

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11. What is the purpose of data binding in MVVM architecture?

To define the root URL for all API requests

To create user interfaces for the app

To simplify UI updates and data binding

To manage project files and folders

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12. What is the primary benefit of using MVVM architecture?

Enhanced app security and integrity

Improved separation of concerns

Increased code complexity

Faster app performance

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13. How does MVVM architecture promote code reusability?

By specifying it in the AndroidManifest.xml file

By using a single layout for all screens

By shaking the emulator's window

By encapsulating logic in ViewModel classes

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14. What is a LiveData transformation in MVVM?

A programming language

A type of emulator

A virtual reality device

A way to transform LiveData using functions

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15. How can you perform LiveData transformations in an Android app?

By manually iterating through LiveData items

By shaking the emulator's window

By using LiveData's "Transformations" class

By specifying it in the AndroidManifest.xml file

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16. What is the purpose of LiveData transformations?

To manage project files and folders

To create user interfaces for the app

To modify LiveData data before it's observed

To define the root URL for all API requests

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17. What is data binding expressions in MVVM?

A type of emulator

A programming language

A virtual reality device

A way to bind UI components to ViewModel data

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18. How can you use data binding expressions in an Android app?

By writing complex Java code

By specifying it in the AndroidManifest.xml file

By shaking the emulator's window

By embedding them in XML layout files

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19. What is the purpose of data binding expressions?

To define the root URL for all API requests

To manage project files and folders

To create user interfaces for the app

To define binding between UI components and data

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20. What is two-way data binding in MVVM?

A virtual reality device

A type of emulator

A programming language

A mechanism for updating UI and ViewModel data

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21. How can you implement two-way data binding in an Android app?

By using the "@={}" syntax

By specifying it in the AndroidManifest.xml file

By manually updating UI and ViewModel data

By shaking the emulator's window

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22. What is the purpose of two-way data binding?

To create user interfaces for the app

To define the root URL for all API requests

To keep UI and ViewModel data synchronized

To manage project files and folders

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23. What is the Android ViewModel library used for?

A programming language

To provide a ViewModel class for Android apps

A virtual reality device

A type of emulator

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24. How can you use the Android ViewModel library in an Android app?

By specifying it in the AndroidManifest.xml file

By manually creating a ViewModel class

By shaking the emulator's window

By adding the "ViewModel" dependency in the build.gradle file

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25. What is the primary benefit of using the Android ViewModel library?

Enhanced UI layout design

Simplified API integration

Improved lifecycle awareness and data retention

Faster app performance

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26. How can you handle configuration changes with ViewModel in MVVM?

By specifying it in the AndroidManifest.xml file

By manually saving and restoring data

By using the ViewModel's built-in data retention

By shaking the emulator's window

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27. What is the role of the Android LiveData library in MVVM?

A type of emulator

A programming language

A virtual reality device

To provide observable data for UI components

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28. How can you use the Android LiveData library in an Android app?

By specifying it in the AndroidManifest.xml file

By manually observing data changes

By shaking the emulator's window

By adding the "LiveData" dependency in the build.gradle file

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Android Studio – 30 – MVVM Architecture in Android MCQ