Google Developers Certification - Associate Android Developer (Kotlin and Java Exam) - Associate-Android-Developer Exam Practice Test

Question 1

For example, our preferences.xml file was added by addPreferencesFromResource (R.xml.preferences). Our preferences.xml file contains such item:
<ListPreference android:id="@+id/order_by" android:key="@string/pref_sort_key" android:title="@string/pref_sort_title" android:summary="@string/pref_sort_summary" android:dialogTitle="@string/pref_sort_dialog_title" android:entries="@array/sort_oder" android:entryValues="@array/sort_oder_value" android:defaultValue="@string/pref_default_sort_value" app:iconSpaceReserved="false" /> In our Fragment, we can dynamically get current notification preference value in this way:

A. String sortBy = PreferenceManager.getDefaultSharedPreferences(getContext ()).getString( getContext().getString(R.string.pref_sort_key), getContext().getResources().getBoolean(R.bool.pref_default_sort_value) );

B. boolean sortBy = PreferenceManager.getSharedPreferences(getContext()).getBoolean ( getContext().getResources().getBoolean(R.bool.pref_default_sort_value), getContext().getString(R.string.pref_sort_key) );

C. String sortBy = PreferenceManager.getSharedPreferences(getContext()).getString( getContext().getString(R.string.pref_default_sort_value), getContext().getString(R.string.pref_sort_key) );

D. String sortBy = PreferenceManager.getDefaultSharedPreferences(getContext ()).getString( getContext().getString(R.string.pref_sort_key), getContext().getString(R.string.pref_default_sort_value) ) Section: JAVA only Explanation

Correct Answer: D

Question 2

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:

A. override fun onCreateOptionsMenu(menu: Menu): Boolean { menuInflater.inflate(R.menu.menu_main, menu) return true
}

B. override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.menu.menu_main)
}

C. override fun onOptionsItemSelected(item: MenuItem): Boolean {
menuInflater.inflate(R.menu.menu_main, menu) return super.onOptionsItemSelected(item)
}

Correct Answer: A

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Question 3

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?

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 "a" would be set at first and would not be overridden with the value "b".

D. The value "b" would be set at first and would not be overridden with the value "a".

Correct Answer: B

Question 4

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

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

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

Correct Answer: C

Question 5

About running a debuggable build variant. Usually, you can just select the default "debug" variant that's included in every Android Studio project (even though it's not visible in the build.gradle file). But if you define new build types that should be debuggable, you must add 'debuggable true' to the build type. Is that mostly true?

A. Yes.

B. No, the debug variant should be visible in the build.gradle file anyway.

C. No, if you define new build types that should be debuggable, you must add 'debuggable false'

Correct Answer: A

Question 6

For example, we have a file in our assets folder app/src/main/assets/sample_teas.json. To get an InputStream for reading it, from out Context context, we can try do this:

A. val input = context!!.resources.openRawResource(R.raw.sample_teas)

B. val input = context!!.assets.open("sample_teas.json")

C. val input = context!!.resources.assets.open("sample_teas.json")

Correct Answer: B

Question 7

Once your test has obtained a UiObject object, you can call the methods in the UiObject class to perform user interactions on the UI component represented by that object. You can specify such actions as: (Choose four.)

A. touch() : Touch the center of the visible bounds of the UI element.

B. swipeUp() : Performs the swipe up action on the UiObject. Similarly, the swipeDown(), swipeLeft(), and swipeRight() methods perform corresponding actions.

C. dragTo() : Drags this object to arbitrary coordinates.

D. setText() : Sets the text in an editable field, after clearing the field's content. Conversely, the clearTextField() method clears the existing text in an editable field.

E. moveTo() : Move this object to arbitrary coordinates.

F. click() : Clicks the center of the visible bounds of the UI element.

Correct Answer: B,C,D,F

Question 8

If constant LENGTH_INDEFINITE is used as a parameter for the setDuration method in Snackbar, what will happen?

A. The Snackbar will be displayed from the time that is shown until either it is dismissed, or another Snackbar is shown.

B. The constant LENGTH_INDEFINITE is impossible parameter for the setDuration method in Snackbar

C. The Snackbar will be displayed for a very long period of time.

D. The Snackbar will be displayed for a short period of time.

E. The Snackbar will be displayed for a long period of time.

Correct Answer: A

Question 9

Filter logcat messages. If in the filter menu, a filter option "Show only selected application"? means:

A. Create or modify a custom filter. For example, you could create a filter to view log messages from two apps at the same time.

B. Apply no filters. Logcat displays all log messages from the device, regardless of which process you selected.

C. Display the messages produced by the app code only (the default). Logcat filters the log messages using the PID of the active app.

Correct Answer: C

Question 10

The diagram below shows a basic form of the recommended architecture for apps that use Architecture Components. The architecture consists of a UI controller, a ViewModel that serves LiveData, a Repository, and a Room database. Drag modules to correct places.

Correct Answer:

Google Developers Certification - Associate Android Developer (Kotlin and Java Exam) - Associate-Android-Developer Exam Practice Test

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