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Google Associate Android Developer Practice Test - Questions Answers, Page 6

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Question 51

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SharedPreferences.Editor is an interface used for modifying values in a SharedPreferences object. All changes you make in an editor are batched, and not copied back to the original SharedPreferences

Question 52

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SharedPreferences.Editor is an interface used for modifying values in a SharedPreferences object. To mark in the editor that a preference value should be removed, which will be done in the actual pr

Question 53

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What is the incorrect statement about Data Access Object (androidx.room.Dao)?

Question 54

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By adding a RoomDatabase.Callback to the room database builder RoomDatabase.Builder (method addCallback(RoomDatabase.Callback callback)), we can: (Choose two.)

Question 55

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By executing an allowMainThreadQueries() method to the room database builder RoomDatabase.Builder, we can:

Question 56

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Room can export your database's schema information into a JSON file at compile time. What annotation processor property you should set in your app/build.gradle file to export the schema?

Question 57

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If you added to your build.gradle file a room.schemaLocation: android { defaultConfig { javaCompileOptions { annotationProcessorOptions { arguments = ["room.schemaLocation": "$projectDir/schemas".

Question 58

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Select 3 major components of the Room. (Choose three.)

Question 59

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A class that you create for managing multiple data sources. In addition to a Room database, this class could manage remote data sources such as a web server. It is about:

Question 60

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@Query is the main annotation used in DAO classes. It allows you to perform read/write operations on a database. Each @Query method is verified at compile time, so what happens if there is a problem

Question 51

SharedPreferences.Editor is an interface used for modifying values in a SharedPreferences object. All changes you make in an editor are batched, and not copied back to the original SharedPreferences until you call:

commit()

apply()

commit() or apply()

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Question 52

SharedPreferences.Editor is an interface used for modifying values in a SharedPreferences object. To mark in the editor that a preference value should be removed, which will be done in the actual preferences once commit() or apply() is called, what method in SharedPreferences.Editor should we use?

delete(String key)

clear()

remove(String key)

removeAll()

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Question 53

What is the incorrect statement about Data Access Object (androidx.room.Dao)?

Data Access Objects are the main classes where you define your database interactions. They can include a variety of query methods.

The class marked with @Dao should either be an interface or an abstract class. At compile time, Room will generate an implementation of this class when it is referenced by a Database.

An abstract @Dao class can optionally have a constructor that takes a Database as its only parameter.

It is recommended to have only one Dao class in your codebase for all tables.

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Question 54

By adding a RoomDatabase.Callback to the room database builder RoomDatabase.Builder (method addCallback(RoomDatabase.Callback callback)), we can: (Choose two.)

set the database factory

handle database first time creation

handle database opening

disable the main thread query check for Room

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Question 55

By executing an allowMainThreadQueries() method to the room database builder RoomDatabase.Builder, we can:

set the database factory

handle database first time creation

handle database opening

disable the main thread query check for Room

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Question 56

Room can export your database's schema information into a JSON file at compile time. What annotation processor property you should set in your app/build.gradle file to export the schema?

room.expandProjection

room.incremental

room.schemaLocation

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Question 57

If you added to your build.gradle file a room.schemaLocation:

android { defaultConfig { javaCompileOptions { annotationProcessorOptions {

arguments = ["room.schemaLocation": "$projectDir/schemas".toString()]

}

}}

Then, you build your app or module.

As a result you got a json file, with such path to it:

app/schemas/your_app_package/db_package/DbClass/DB_VERSION.json

What are the correct statements about this file? (Choose all that apply.)

It's a file with Room-exported schema

Main JSONObject in this file usually should contain a number "formatVersion" and a JSONObject "database"

The JSONObject "database" in this file usually should contain such objects, like "entities", "views", "setupQueries", ets.

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Question 58

Select 3 major components of the Room. (Choose three.)

@Entity

@Query

@RawQuery

@DAO

@WorkerThread

@Database

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Question 59

A class that you create for managing multiple data sources. In addition to a Room database, this class could manage remote data sources such as a web server. It is about:

Activity/Fragment

ViewModel

Repository

Room database

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Question 60

@Query is the main annotation used in DAO classes. It allows you to perform read/write operations on a database. Each @Query method is verified at compile time, so what happens if there is a problem with the query?

a runtime error occurs instead of a compilation failure.

a compilation error occurs instead of a runtime failure.

both compilation error and runtime failure occurs.

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Total 128 questions