MCQ King
Android Studio – 31 – LiveData and ViewModel
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1. What is LiveData in Android development?
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2. What is the primary purpose of LiveData in Android?
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3. What is the benefit of using LiveData for UI updates?
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4. How can you create a LiveData object in Android?
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5. What is the primary purpose of ViewModel in Android?
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6. How does ViewModel help manage UI-related data?
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7. How can you create a ViewModel object in Android?
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8. What is the key benefit of using ViewModel with LiveData?
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9. How does ViewModel survive configuration changes?
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10. What is the purpose of the ViewModelFactory in Android?
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11. How can you create a ViewModelFactory in Android?
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12. What is the purpose of the “ViewModelProvider” class in Android?
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13. How can you obtain a ViewModel instance using ViewModelProvider?
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14. What is the purpose of the “observe” method in LiveData?
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15. How can you observe LiveData changes in Android?
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16. What happens when LiveData data changes and there are active observers?
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17. What is the primary benefit of using LiveData for data updates?
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18. What is the purpose of the “onChanged” method in LiveData observers?
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19. How can you implement the “onChanged” method in LiveData observers?
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20. What is the primary benefit of using ViewModel with LiveData?
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21. How can you create a ViewModelFactory for a specific ViewModel class?
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22. What is the purpose of the “ViewModelProvider.Factory” interface?
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23. How can you use a ViewModelFactory to create a ViewModel instance?
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24. What is the ViewModelScope in Android development?
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25. How does the ViewModelScope relate to ViewModel instances?
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26. What is the purpose of the “by viewModels()” delegate in Android?
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27. How can you use the “by viewModels()” delegate to create a ViewModel instance?
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28. What is the benefit of using the “by viewModels()” delegate?
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