Google Associate-Android-Developer Exam Practice Test Instant Access

Question 1

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:

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

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

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

Answer : A

https://developer.android.com/guide/topics/ui/accessibility/custom-views

Question 2

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.

A@Override
public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
boolean completed = super.dispatchPopulateAccessibilityEvent(event);
CharSequence text = getText();
if (!TextUtils.isEmpty(text)) {
event.getText().add(text);
return true;
}
return completed;
}

B@Override
public boolean onKeyUp (int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) {
currentValue--;
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
return true;
}
...
}

C@Override
public boolean onKeyUp (int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_ENTER) {
currentValue--;
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED);
return true;
}
...
}

Answer : B

https://developer.android.com/guide/topics/ui/accessibility/custom-views

Question 3

What happens when you create a DAO method and annotate it with @Insert?

Example:

@Dao

interface MyDao {

@Insert(onConflict = OnConflictStrategy.REPLACE)

fun insertUsers(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 : A

Question 4

For example, our preferences.xml file was added by addPreferencesFromResource (R.xml.preferences). Our preferences.xml file contains such item:

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:

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

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

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

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

Answer : D

Question 5

For example, we have a BufferedReader reader, associated with the json file through

InputStreamReader. To get a file data we can do this:

AString line; try {
while ((line = reader.readLine()) != null) { builder.append(line);
}
JSONObject json = new JSONObject(builder.toString());
return json;
} catch (IOException | JSONException exception) {
exception.printStackTrace();
}

BJSONObject line; try {
while ((line = reader.readJSONObject ()) != null) { builder.append(line);
}
JSONObject json = new JSONObject(builder.toString());
return json;
} catch (IOException | JSONException exception) {
exception.printStackTrace();
}

CString line; try {
while ((line = reader.readLine()) != null) { builder.append(line);
}
JSONObject json = new JSONObject(builder.toString());
return json;
} catch (RuntimeException|ArrayIndexOutOfBoundsException exception) {
exception.printStackTrace();
}

Answer : A

Question 6

When using an EditTexts or editable TextViews, or other editable View. What attribute to use to provide a content label for that View?

Aandroid:contentDescription

Bandroid:hint

Candroid:labelFor

Answer : B

https://support.google.com/accessibility/android/answer/7158690?hl=en

Question 7

What is illustrated in the picture?

ALogcat window with filter settings

BDebugging native code using LLDB

CThe Variables and Watches panes in the Debugger window

DThe Breakpoints window lists all the current breakpoints and includes behavior settings for each

EAdding a watchpoint to a variable in memory

Answer : E

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