Android Studio - 24 - Android Room Database MCQ

Android Studio – 24 – Android Room Database

1 / 28

1. What is Android Room Database?

A type of emulator

A virtual reality device

A programming language

A persistence library for Android applications

2 / 28

2. What is the primary purpose of using Room Database in an Android app?

Storing and managing app data locally

Improving app performance

Simplifying UI code and making it more readable

Enhancing app security and data encryption

3 / 28

3. What are the key components of Room Database?

Adapter, ViewHolder, and ItemDecoration

Activity, Fragment, and Service

ViewModel, LiveData, and RecyclerView

Entity, DAO, and Repository

4 / 28

4. What is an Entity in Android Room Database?

A database table representation

A programming language

A type of emulator

A virtual reality device

5 / 28

5. How can you define an Entity in Room Database?

By using the "Define Entity" button

By adding a class with @Entity annotation

By specifying it in the AndroidManifest.xml file

By shaking the emulator's window

6 / 28

6. What does the @Entity annotation represent in Room Database?

A type of emulator

A database table representation

A virtual reality device

A programming language

7 / 28

7. What is a DAO in Android Room Database?

A programming language

A type of emulator

A virtual reality device

A data access object

8 / 28

8. How can you define a DAO in Room Database?

By using the "Define DAO" button

By shaking the emulator's window

By specifying it in the AndroidManifest.xml file

By adding a class with @Dao annotation

9 / 28

9. What is the purpose of the @Dao annotation in Room Database?

To manage project files and folders

To define database entities

To create user interfaces for the app

To specify the data access methods

10 / 28

10. What is a Repository in Android Room Database?

A virtual reality device

A data access object

A type of emulator

A programming language

11 / 28

11. How can you define a Repository in Room Database?

By shaking the emulator's window

By using the "Define Repository" button

By specifying it in the AndroidManifest.xml file

By adding a class with @Repository annotation

12 / 28

12. What is the primary purpose of the Repository pattern in Room Database?

To define database entities

To manage data access and abstract data sources

To handle UI logic

To create user interfaces for the app

13 / 28

13. How can you define a primary key for an Entity in Room Database?

By specifying it in the AndroidManifest.xml file

By using the "Define Primary Key" button

By adding a field with @PrimaryKey annotation

By shaking the emulator's window

14 / 28

14. What is the purpose of a primary key in Room Database?

To uniquely identify rows in a database table

To define database entities

To manage project files and folders

To create user interfaces for the app

15 / 28

15. How can you establish relationships between Entities in Room Database?

By adding foreign key fields and annotations

By specifying them in the AndroidManifest.xml file

By shaking the emulator's window

By using the "Define Relationship" button

16 / 28

16. What is the purpose of establishing relationships between Entities in Room Database?

To create user interfaces for the app

To specify how data in one Entity relates to data in another Entity

To define the structure of the database

To manage project files and folders

17 / 28

17. What is a foreign key in Room Database?

A programming language

A virtual reality device

A key that links one Entity to another Entity

A type of emulator

18 / 28

18. How can you define a foreign key in Room Database?

By adding a field with @ForeignKey annotation

By shaking the emulator's window

By using the "Define Foreign Key" button

By specifying it in the AndroidManifest.xml file

19 / 28

19. What is the purpose of the @ForeignKey annotation in Room Database?

To manage project files and folders

To define database relationships

To create user interfaces for the app

To specify the data access methods

20 / 28

20. How can you perform CRUD operations with Room Database?

By specifying them in the AndroidManifest.xml file

By using the "CRUD Wizard"

By shaking the emulator's window

By writing SQL queries

21 / 28

21. What is the primary purpose of CRUD operations in Room Database?

To manage data access and manipulate data

To define database entities

To create user interfaces for the app

To handle UI logic

22 / 28

22. How can you execute queries asynchronously in Room Database?

By specifying it in the AndroidManifest.xml file

By using the "Execute Query Asynchronously" button

By using AsyncTask

By shaking the emulator's window

23 / 28

23. What is the recommended way to execute queries asynchronously in Room Database?

A type of emulator

A virtual reality device

By using AsyncTask

By using LiveData and ViewModel

24 / 28

24. What is LiveData in Room Database?

A virtual reality device

An observable data holder class

A programming language

A type of emulator

25 / 28

25. How can you observe LiveData updates in a ViewModel?

By shaking the emulator's window

By specifying it in the AndroidManifest.xml file

By using the "Observe LiveData" button

By using LiveData objects in the ViewModel

26 / 28

26. What is the primary purpose of LiveData in Room Database?

To provide real-time updates of data changes

To define database entities

To manage project files and folders

To create user interfaces for the app

27 / 28

27. How can you use Room Database with RecyclerView in an Android app?

By using the "Use Room with RecyclerView" option

By writing custom RecyclerView adapters

By binding a LiveData list to the RecyclerView

By shaking the emulator's window

28 / 28

28. What is the role of Room Database in RecyclerView?

To manage database operations and provide data

To improve app performance

A virtual reality device

To create user interfaces for the app

Your score is

Android Studio – 24 – Android Room Database MCQ