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Guide for Associate Android Developer

Quiz Associate Android Developer

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/ 10

Quiz

1/10
What is a correct part of an Implicit Intent for sharing data implementation?
Select the answer
1 correct answer
A.
val sendIntent = Intent(this, UploadService::class.java).apply { putExtra(Intent.EXTRA_TEXT,
textMessage)
...
B.
val sendIntent = Intent().apply { type = Intent.ACTION_SEND;
...
C.
val sendIntent = Intent(this, UploadService::class.java).apply { data = Uri.parse(fileUrl)
...
D.
val sendIntent = Intent().apply { action = Intent.ACTION_SEND
...

Quiz

2/10
By default, the notification's text content is truncated to fit one line. If you want your notification to
be longer, for example, to create a larger text area, you can do it in this way:
Select the answer
1 correct answer
A.
var builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setContentText("Much longer text that cannot fit one line...")
.setStyle(NotificationCompat.BigTextStyle()
.bigText("Much longer text that cannot fit one line..."))
...
B.
var builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setContentText("Much longer text that cannot fit one line...")
.setLongText("Much longer text that cannot fit one line..."))
...
C.
var builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setContentText("Much longer text that cannot fit one line...")
.setTheme(android.R.style.Theme_LongText);
...

Quiz

3/10
Select correct demonstration of WorkRequest cancellation.
Select the answer
1 correct answer
A.
workManager.enqueue(OneTimeWorkRequest.Builder(FooWorker::class.java).build())
B.
val request: WorkRequest = OneTimeWorkRequest.Builder (FooWorker::class.java).build()
workManager.enqueue(request)
val status = workManager.getWorkInfoByIdLiveData(request.id) status.observe(...)
C.
val request: WorkRequest = OneTimeWorkRequest.Builder (FooWorker::class.java).build()
workManager.enqueue(request) workManager.cancelWorkById(request.id)
D.
val request1: WorkRequest = OneTimeWorkRequest.Builder (FooWorker::class.java).build()
val request2: WorkRequest = OneTimeWorkRequest.Builder (BarWorker::class.java).build()
val request3: WorkRequest = OneTimeWorkRequest.Builder (BazWorker::class.java).build()
workManager.beginWith(request1, request2).then(request3).enqueue()
E.
val request: WorkRequest = OneTimeWorkRequest.Builder (FooWorker::class.java).build()
workManager.enqueue(request) workManager.cancelWork(request)

Quiz

4/10
In general, you should send an AccessibilityEvent whenever the content of your custom view
changes. For example, if you are implementing a custom slider bar that allows a user to select a
numeric value by pressing the left or right arrows, your custom view should emit an event of type
TYPE_VIEW_TEXT_CHANGED whenever the slider value changes. Which one of the following sample
codes demonstrates the use of the sendAccessibilityEvent() method to report this event.
Select the answer
1 correct answer
A.
override fun dispatchPopulateAccessibilityEvent(event: AccessibilityEvent): Boolean {
return super.dispatchPopulateAccessibilityEvent(event).let { completed -> if (text?.isNotEmpty() ==
true) {
event.text.add(text) true
} else {
completed
}
}
}
B.
override fun onKeyUp(keyCode: Int, event: KeyEvent): Boolean { return when(keyCode) {
KeyEvent.KEYCODE_DPAD_LEFT -> {
currentValue--
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED)
true
}
...
}
}
C.
override fun onKeyUp(keyCode: Int, event: KeyEvent): Boolean { return when(keyCode) {
KeyEvent.KEYCODE_ENTER -> {
currentValue--
sendAccessibilityEvent
(AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED)
true
}
...
}
}

Quiz

5/10
The easiest way of adding menu items (to specify the options menu for an activity) is inflating an
XML file into the Menu via MenuInflater. With menu_main.xml we can do it in this way:
Select the answer
1 correct answer
A.
override fun onCreateOptionsMenu(menu: Menu): Boolean {
menuInflater.inflate(R.menu.menu_main, menu)
return true
}
B.
override fun onOptionsItemSelected(item: MenuItem): Boolean {
menuInflater.inflate(R.menu.menu_main, menu) return super.onOptionsItemSelected(item)
}
C.
override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)
setContentView(R.menu.menu_main)
}

Quiz

6/10
Android Tests. You can use the childSelector() method to nest multiple UiSelector instances. For
example, the following code example shows how your test might specify a search to find the first
ListView in the currently displayed UI, then search within that ListView to find a UI element with the
text property Apps.
What is the correct sample?
Select the answer
1 correct answer
A.
val appItem: UiObject = device.findObject( UiSelector().className(ListView.class)
.instance(1)
.childSelector(
UiSelector().text("Apps")
)
)
B.
val appItem: UiObject = device.findObject( UiSelector().className("android.widget.ListView")
.instance(0)
.childSelector(
UiSelector().text("Apps")
)
)
C.
val appItem: UiObject = device.findObject( UiSelector().className("android.widget.ListView")
.instance(
UiSelector().text("Apps")
)
)

Quiz

7/10
The following code snippet shows an example of an Espresso test:
Select the answer
1 correct answer
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()))
}

Quiz

8/10
As an example. In an Activity we have our TimerViewModel object (extended ViewModel), named
mTimerViewModel. mTimerViewModel.timer method returns a LiveData<Long> value. What can be
a correct way to set an observer to change UI in case if data was changed?
Select the answer
1 correct answer
A.
mTimerViewModel!!.timer.value.toString().observe
(Observer { aLong -> callAnyChangeUIMethodHere(aLong!!) })
B.
mTimerViewModel!!.timer.observe
(this, Observer { aLong -> callAnyChangeUIMethodHere(aLong!!) })
C.
mTimerViewModel.observe
(Observer { aLong -> callAnyChangeUIMethodHere(aLong!!) })

Quiz

9/10
LiveData.postValue() and LiveData.setValue() methods have some differences. So if you have a
following code executed in the main thread:
liveData.postValue("a"); liveData.setValue("b");
What will be the correct statement?
Select the answer
1 correct answer
A.
The value "b" would be set at first and later the main thread would override it with the value "a".
B.
The value "a" would be set at first and later the main thread would override it with the value "b".
C.
The value "b" would be set at first and would not be overridden with the value "a".
D.
The value "a" would be set at first and would not be overridden with the value "b".

Quiz

10/10
In our TeaViewModel class, that extends ViewModel, we have such prorerty:
val tea: LiveData<Tea>
An observer in our Activity (type of mViewModel variable in example is TeaViewModel) is set in this
way:

mViewModel!!.tea.observe(this, Observer { tea: Tea? -> displayTea(tea) })
What will be a correct displayTea method definition?
Select the answer
1 correct answer
A.
private fun displayTea()
B.
private fun displayTea(tea: Tea?)
C.
private fun displayTea(tea: LiveData?<Tea>)
D.
private fun displayTea(tea: LiveData?<T>)
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Info quiz:

  • Quiz name:Associate Android Developer
  • Total number of questions:126
  • Number of questions for the test:50
  • Pass score:80%

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