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Viewing questions 31-40 out of questions
Questions # 31:

The Layout Inspector in Android Studio allows you to compare your app layout with design mockups, display a magnified or 3D view of your app, and examine details of its layout at runtime. When this is especially useful?

Options:

A.

when your layout is built entirely in XML rather than runtime and the layout is behaving expectedly.

B.

when your layout is built at runtime rather than entirely in XML and the layout is behaving unexpectedly.

Questions # 32:

@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?

Options:

A.

a runtime error occurs instead of a compilation failure.

B.

a compilation error occurs instead of a runtime failure.

C.

both compilation error and runtime failure occurs.

Questions # 33:

Question # 33

The Testing Pyramid, shown in the Figure, illustrates how your app should include the three categories of tests: small, medium, and large. Medium tests are integration tests that:

Options:

A.

validate your app's behavior one class at a time.

B.

validate either interactions between levels of the stack within a module, or interactions between related modules.

C.

validate user journeys spanning multiple modules of your app.

Questions # 34:

In a class extended PreferenceFragmentCompat. What method is used to inflate the given XML resource and add the preference hierarchy to the current preference hierarchy?

Options:

A.

findPreference

B.

getPreferenceManager

C.

addPreferencesFromResource

D.

setPreferenceScreen

Questions # 35:

The Log class allows you to create log messages that appear in logcat. Generally, you could use the following log methods: (Choose five.)

Options:

A.

Log.e(String, String) (error)

B.

Log.a(String, String) (all outputs)

C.

Log.w(String, String) (warning)

D.

Log.i(String, String) (information)

E.

Log.q(String, String) (QUESTION NO:s)

F.

Log.d(String, String) (debug)

G.

Log.v(String, String) (verbose)

Questions # 36:

By adding a RoomDatabase.Callback to the room database builder RoomDatabase.Builder (method

addCallback(RoomDatabase.Callback callback)), we can: (Choose two.)

Options:

A.

set the database factory

B.

handle database first time creation

C.

handle database opening

D.

disable the main thread query check for Room

Questions # 37:

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

Options:

A.

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

B.

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.

C.

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

D.

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

Questions # 38:

What do you want from Room when you create a DAO method and annotate it with @Delete?

Example:

@Dao

interface MyDao {

@Delete

fun deleteUsers(vararg users: User)

}

Options:

A.

Room generates an implementation that inserts all parameters into the database in a single transaction.

B.

Room modifies a set of entities, given as parameters, in the database. It uses a query that matches against the primary key of each entity.

C.

Room removes a set of entities, given as parameters, from the database. It uses the primary keys to find the entities to delete.

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