Google Associate-Android-Developer 問題集

質問 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. val sortBy = PreferenceManager.getDefaultSharedPreferences(context).getString( context!!.getString(R.string.pref_sort_key), context!!.resources.getBoolean(R.bool.pref_default_sort_value) )
B. val sortBy = PreferenceManager.getSharedPreferences(context).getString( context!!.getString(R.string.pref_default_sort_value), context!!.getString(R.string.pref_sort_key), )
C. val sortBy = PreferenceManager.getDefaultSharedPreferences(context).getString( context!!.getString(R.string.pref_sort_key), context!!.getString(R.string.pref_default_sort_value) )
D. val sortBy = PreferenceManager.getSharedPreferences(context).getBoolean( context!!.resources.getBoolean(R.bool.pref_default_sort_value), context!!.getString(R.string.pref_sort_key) )
正解：C

質問 2：
What statements about InputStreamReader (java.io.InputStreamReader) are correct? (Choose two.)
A. An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified charset. The charset that it uses may be specified by name or may be given explicitly, or the platform's default charset may be accepted.
B. No any invocation of one of an InputStreamReader's read() methods can cause some bytes to be read from the underlying byte-input stream.
C. Each invocation of one of an InputStreamReader's read() methods may cause one or more bytes to be read from the underlying byte-input stream. To enable the efficient conversion of bytes to characters, more bytes may be read ahead from the underlying stream than are necessary to satisfy the current read operation.
D. An InputStreamReader is a bridge from character streams to byte streams: It reads characters using a specified charset and encodes them into bytes. The charset that it uses may be specified by name or may be given explicitly, or the platform's default charset may be accepted.
正解：A,C

質問 3：
We have a custom view that extends android.widget.ProgressBar. Our progress bar is not touchable, focusable, etc.: it just shows progress. Style for our custom progress bar extends
"Widget.AppCompat.ProgressBar.Horizontal". An item, named "progressDrawable", in our style, is a xml file . What we usually can see as a main single element in this xml file:
A. A State List (<selector> element )
B. An <ImageView> element with android:id="@+id/progress" identifier
C. A Layer List (<layer-list> element) with items android:id="@+id/progress" and android:id="@+id/ background" inside it.
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 4：
Which build options in the Build menu to choose to delete all intermediate/cached build files.
A. Make Module
B. Rebuild Project
C. Clean Project
D. Make Project
E. Generate Signed Bundle / APK
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 5：
If you added to your build.gradle file a room.schemaLocation:
android {
defaultConfig {
javaCompileOptions {
annotationProcessorOptions {
arguments = ["room.schemaLocation": "$projectDir/schemas".toString
()]
}
}
}
}
Then, you build your app or module.
As a result you got a json file, with such path to it: app/schemas/your_app_package/db_package/DbClass/DB_VERSION.json What are the correct statements about this file? (Choose all that apply.)
A. It's a file with Room-exported schema
B. Main JSONObject in this file usually should contain a number "formatVersion" and a JSONObject "database"
C. The JSONObject "database" in this file usually should contain such objects, like "entities", "views", "setupQueries", ets.
正解：A,B,C
解説: (Topexam メンバーにのみ表示されます)

質問 6：
With recommended app architecture. Fill the following diagram, which shows how all the modules usually should interact with one another after designing the app (drag modules to correct places).

正解：


質問 7：
For example, we have a BufferedReader reader, associated with the json file through InputStreamReader. To get a file data we can do this:
A. JSONObject line; try {
while ((line = reader.readJSONObject ()) != null) { builder.append(line);
}
JSONObject json = new JSONObject(builder.toString());
return json;
} catch (IOException | JSONException exception) {
exception.printStackTrace();
}
B. String line; try {
while ((line = reader.readLine()) != null) { builder.append(line);
}
JSONObject json = new JSONObject(builder.toString());
return json;
} catch (IOException | JSONException exception) {
exception.printStackTrace();
}
C. String line; try {
while ((line = reader.readLine()) != null) { builder.append(line);
}
JSONObject json = new JSONObject(builder.toString());
return json;
} catch (RuntimeException|ArrayIndexOutOfBoundsException exception) {
exception.printStackTrace();
}
正解：B