Google Associate-Android-Developer Exam Practice Test Instant Access

Question 1

The following code snippet shows an example of an Espresso test:

A@Rule
fun greeterSaysHello() {
onView(withId(R.id.name_field)).do(typeText('Steve'))
onView(withId(R.id.greet_button)).do(click())
onView(withText('Hello Steve!')).check(matches(isDisplayed()))
}

B@Test
fun greeterSaysHello() {
onView(withId(R.id.name_field)).perform(typeText('Steve'))
onView(withId(R.id.greet_button)).perform(click())
onView(withText('Hello Steve!')).check(matches(isDisplayed()))
}

C@Test
fun greeterSaysHello() {
onView(withId(R.id.name_field)).do(typeText('Steve'))
onView(withId(R.id.greet_button)).do(click())
onView(withText('Hello Steve!')).compare(matches(isDisplayed()))
}

Answer : B

Question 2

To automate UI tests with Android Studio, you implement your test code in a separate Android test folder. Folder could be named:

Aapp/androidTest/java

Bapp/src/androidTest/java

Capp/java/androidTest

Answer : B

Question 3

@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?

Aa runtime error occurs instead of a compilation failure.

Ba compilation error occurs instead of a runtime failure.

Cboth compilation error and runtime failure occurs.

Answer : B

Question 4

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

ALog.e(String, String) (error)

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

CLog.w(String, String) (warning)

DLog.i(String, String) (information)

ELog.q(String, String) (Question:s)

FLog.d(String, String) (debug)

GLog.v(String, String) (verbose)

Answer : A, C, D, F, G

Question 5

In our TeaViewModel class, that extends ViewModel, we have such method:

public LiveData getTea() { return mTea;

}

An observer in our Activity (type of mViewModel variable in example is TeaViewModel) is set in this way:

mViewModel.getTea().observe(this, this::displayTea);

What will be a correct displayTea method definition?

Aprivate void displayTea()

Bprivate void displayTea(Tea tea)

Cprivate void displayTea(LiveData<Tea>)

Dprivate void displayTea(LiveData<T>)

Answer : B

Question 6

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:

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

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

Cvalidate user journeys spanning multiple modules of your app.

Answer : B

Question 7

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)

}

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

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

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

Answer : C

Google Associate Android Developer Associate-Android-Developer Exam Practice Test