Deck 7: Google Analytics Individual Qualification

Question 1

In our TeaViewModel class, that extends ViewModel , we have such prorerty: val tea: LiveData An observer in our Activity (type of mViewModel variable in example is ) is set in this way: mViewModel!!. tea .observe(this, Observer { tea: Tea? -> displayTea(tea) } ) What will be a correct displayTea method definition?

A) private fun displayTea()
B) private fun displayTea(tea: Tea?)
C) private fun displayTea(tea: LiveData?)
D) private fun displayTea(tea: LiveData?)

Answer 1

private fun displayTea(tea: Tea?)

Question 2

If you want the Database Inspector to automatically update the data it presents as you interact with your running app, check the Live updates checkbox at the top of the inspector window. While live updates are enabled, what happens with the table in the inspector window?

A) It is still editable. You can modify data in a table by double-clicking a cell, typing a new value, and pressing Enter.
B) It becomes read-only and you cannot modify its values.
C) It becomes read-only, but you cannot see its updated values before updating the data by clicking the Refresh table button at the top of the inspector window.

Answer 2

It becomes read-only and you cannot modify its values.

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)
}

A) Room generates an implementation that inserts all parameters into the database in a single transaction.
B) Room modifies a set of entities, given as parameters, in the database. It uses a query that matches against the primary key of each entity.
C) Room removes a set of entities, given as parameters, from the database. It uses the primary keys to find the entities to delete.

Answer 3

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

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.)

A) Log.e(String, String) (error)
B) Log.a(String, String) (all outputs)
C) Log.w(String, String) (warning)
D) Log.i(String, String) (information)
E) Log.q(String, String) (questions)
F) Log.d(String, String) (debug)
G) Log.v(String, String) (verbose)

Question 5

When your code execution reaches the breakpoint, Android Studio pauses execution of your app. You can then use the tools in the Debugger tab to identify the state of the app. With Step Into you can

A) examine the object tree for a variable, expand it in the Variables view. If the Variables view is not visible
B) evaluate an expression at the current execution point
C) advance to the next line in the code (without entering a method)
D) advance to the first line inside a method call
E) advance to the next line outside the current method
F) continue running the app normally

Question 6

With a room database. When performing queries, you'll often want your app's UI to update automatically when the data changes. Can you use a return value of type LiveData in your query method description to achieve this?

A) Yes
B) No

Question 7

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

A) app/androidTest/java
B) app/src/androidTest/java
C) app/java/androidTest

Question 8

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)
}

A) Room generates an implementation that inserts all parameters into the database in a single transaction.
B) Room modifies a set of entities, given as parameters, in the database. It uses a query that matches against the primary key of each entity.
C) Room removes a set of entities, given as parameters, from the database. It uses the primary keys to find the entities to delete.

Question 9

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

A) Display the messages produced by the app code only (the default). Logcat filters the log messages using the PID of the active app.
B) Apply no filters. Logcat displays all log messages from the device, regardless of which process you selected.
C) Create or modify a custom filter. For example, you could create a filter to view log messages from two apps at the same time.

Question 10

When your code execution reaches the breakpoint, Android Studio pauses execution of your app. You can then use the tools in the Debugger tab to identify the state of the app. With Step Out you can

A) examine the object tree for a variable; expand it in the Variables view. If the Variables view is not visible
B) evaluate an expression at the current execution point
C) advance to the next line in the code (without entering a method)
D) advance to the first line inside a method call
E) advance to the next line outside the current method
F) continue running the app normally

Question 11

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) click() : Clicks the center of the visible bounds of the UI element.
B) touch() : Touch the center of the visible bounds of the UI element.
C) dragTo() : Drags this object to arbitrary coordinates.
D) moveTo() : Move this object to arbitrary coordinates.
E) 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. F) swipeUp() : Performs the swipe up action on the UiObject. Similarly, the swipeDown() , swipeLeft() , and swipeRight() methods perform corresponding actions.

Question 12

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

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

Question 13

What is illustrated in the picture?

A) Logcat window with filter settings
B) Debugging native code using LLDB
C) The Variables and Watches panes in the Debugger window
D) The Breakpoints window lists all the current breakpoints and includes behavior settings for each
E) Adding a watchpoint to a variable in memory

Question 14

For example, we have a file in our assets folder app/src/main/assets/sample_teas.json . To get an I nputStream 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")

Question 15

If you want to access a specific UI component in an app, use the UiSelector class. This class represents a query for specific elements in the currently displayed UI. What is correct about it? (Choose two.)

A) If more than one matching element is found, the first matching element in the layout hierarchy is returned as the target UiObject.
B) If no matching UI element is found, an IOException is thrown.
C) If more than one matching element is found, the last matching element in the layout hierarchy is returned as the target UiObject.
D) If no matching UI element is found, a UiAutomatorObjectNotFoundException is thrown.

Question 16

To create a basic JUnit 4 test class, create a class that contains one or more test methods. A test method begins with the specific annotation and contains the code to exercise and verify a single functionality in the component that you want to test. What is the annotation?

A) @RunWith
B) @LargeTest
C) @Rule
D) @Test

Question 17

The Testing Pyramid, shown in the Figure, illustrates how your app should include the three categories of tests: small, medium, and large. Small tests are unit tests that :

A) validate your app's behavior one class at a time.
B) validate either interactions between levels of the stack within a module, or interactions between related modules.
C) validate user journeys spanning multiple modules of your app.

Question 18

What do you want from Room when you create a DAO method and annotate it with @Update? Example:
@Dao
Interface MyDao {
@Update
Fun updateUsers(vararg users: User)
}

A) Room generates an implementation that inserts all parameters into the database in a single transaction.
B) Room modifies a set of entities, given as parameters, in the database. It uses a query that matches against the primary key of each entity.
C) Room removes a set of entities, given as parameters, from the database. It uses the primary keys to find the entities to delete.

Question 19

To run your local unit tests, follow these steps: Be sure your project is synchronized with Gradle by clicking Sync Project in the toolbar. Run your test in one of the following ways (select possible): (Choose three.)

A) To run a single test, open the Project window, and then right-click a test and click Run .
B) To test all methods in a class, right-click a class or method in the test file and click Run
C) To run all tests in a directory, right-click on the directory and select Run tests
D) To run all tests in Project, open the Project window, and then right-click a test and click Run

Question 20

When your code execution reaches the breakpoint, Android Studio pauses execution of your app. You can then use the tools in the Debugger tab to identify the state of the app. With Step Over you can

A) examine the object tree for a variable; expand it in the Variables view.
B) evaluate an expression at the current execution point
C) advance to the next line in the code (without entering a method)
D) advance to the first line inside a method call
E) advance to the next line outside the current method
F) continue running the app normally

Question 21

When scheduling unique work, you must tell WorkManager what action to take when there is a conflict. You do this by passing an enum when enquing the work. For one-time work, you provide an ExistingWorkPolicy , which supports some options for handling the conflict. (Choose four.)

A) REPLACE (existing work with the new work. This option cancels the existing work)
B) KEEP (existing work and ignore the new work)
C) APPEND (the new work to the end of the existing work. This policy will cause your new work to be chained to the existing work, running after the existing work finishes)
D) APPEND_OR_REPLACE (functions similarly to APPEND, except that it is not dependent on prerequisite work status. If the existing work is CANCELLED or FAILED, the new work still runs)
E) APPEND_OR_KEEP (functions similarly to APPEND, except that it is not dependent on prerequisite work status. If the existing work is CANCELLED or FAILED, the new work still not runs)
F) APPEND_AND_RUN (functions similarly to APPEND, except that it is not dependent on prerequisite work status. If the existing work is PAUSED, the new work still runs)
G) DESTROY (if any work exists, the new work will be ignored)
H) APPEND_OR_DESTROY (if no any work exists, the new work will be ignored)

Question 22

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
public boolean onCreateOptionsMenu(Menu menu) {   
getMenuInflater().inflate(R.menu.menu_main, menu);   
return true;
}
B) @Override
public boolean onOptionsItemSelected(MenuItem item) {  
getMenuInflater().inflate(R.menu.menu_main, menu);   
return super.onOptionsItemSelected(item);
}
C) @Override
protected void onCreate(Bundle savedInstanceState) {   
super.onCreate(savedInstanceState);   
setContentView(R.menu.menu_main);
}

Question 23

Building your app from the command line, if you have a "demo" product flavor, then you can build the debug version with the command:

A) gradlew assembleDemoDebug
B) gradlew installDemoDebug
C) both variants are correct.

Question 24

Interface for a callback to be invoked when a shared preference is changed. Interface is named:

A) android.content.SyncStatusObserver
B) android.content.SharedPreferences.Editor
C) android.content.SharedPreferences.OnSharedPreferenceChangeListener
D) android.content.SharedPreferences

Question 25

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. 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) An abstract @Dao class can optionally have a constructor that takes a Database as its only parameter. An abstract class can optionally have a constructor that takes a Database as its only parameter.
D) It is recommended to have only one Dao class in your codebase for all tables.

Question 26

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) 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.
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) No any invocation of one of an InputStreamReader's read() methods can cause some bytes to be read from the underlying byte-input stream.

Question 27

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

A) The Snackbar will be displayed for a short period of time.
B) The Snackbar will be displayed for a long period of time.
C) The Snackbar will be displayed for a very long period of time.
D) The Snackbar will be displayed from the time that is shown until either it is dismissed, or another Snackbar is shown.
E) The constant LENGTH_INDEFINITE is impossible parameter for the setDuration method in Snackbar

Question 28

SharedPreferences.Editor is an interface used for modifying values in a SharedPreferences object. To mark in the editor that a preference value should be removed, which will be done in the actual preferences once commit() or apply() is called, what method in should we use?

A) delete(String key)
B) clear()
C) remove(String key)
D) removeAll()

Question 29

What public methods are there in android.widget.Toast.Callback? (Choose two.)

A) onDismissed()
B) onToastHidden()
C) onShown()
D) onToastShown()
E) onToastCancelled()

Question 30

Assume that you have the following situation: The app code calls for R.string.text_a Three relevant resource files are available: - res/values/strings.xml, which includes text_a in the app's default language, in this case English. - res/values-mcc404/strings.xml, which includes text_a in the app's default language, in this case English. - res/values-hi/strings.xml, which includes text_a in Hindi. The app is running on a device that has the following configuration: - The SIM card is connected to a mobile network in India (MCC 404). - The language is set to Hindi (hi). Which is the correct statement below?

A) Android loads text_a from res/values/strings.xml (in English)
B) Android loads text_a from res/values-mcc404/strings.xml (in English)
C) Android loads text_a from res/values-hi/strings.xml (in Hindi)

Question 31

Select correct statements about Hardware Abstraction Layer (HAL). (Choose two.)

A) The HAL provides standard interfaces that expose device hardware capabilities to the higher-level Java API framework.
B) The HAL function both as apps for users and to provide key capabilities that developers can access from their own app. For example, if your app would like to deliver an SMS message, you don't need to build that functionality yourself - you can instead invoke whichever SMS app is already installed to deliver a message to the recipient you specify
C) The HAL consists of multiple library modules, each of which implements an interface for a specific type of hardware component, such as the camera or bluetooth module. When a framework API makes a call to access device hardware, the Android system loads the library module for that hardware component.
D) Using a HAL, not using a Linux kernel, allows Android to take advantage of key security features and allows device manufacturers to develop hardware drivers for a well-known kernel.

Question 32

SharedPreferences.Editor is an interface used for modifying values in a SharedPreferences object. All changes you make in an editor are batched, and not copied back to the original until you call:

A) commit()
B) apply()
C) commit() or apply() or

Question 33

In a class PreferenceFragmentCompat . As a convenience, this fragment implements a click listener for any preference in the current hierarchy. So, in what overridden method we can handle that a preference in the tree rooted at this PreferenceScreen has been clicked?

A) onCreateLayoutManager
B) onCreatePreferences
C) onCreateRecyclerView
D) onPreferenceTreeClick

Question 34

With our Context we can get SharedPreferences with a method, named: getSharedPreferences(String name, int mode) . What value can we transfer in a "mode"parameter?

A) MODE_PRIVATE or MODE_PUBLIC MODE_PRIVATE or MODE_PUBLIC
B) combination of MODE_WORLD_READABLE and MODE_WORLD_WRITEABLE combination of MODE_WORLD_READABLE and MODE_WORLD_WRITEABLE
C) Value is either 0 or a combination of MODE_PRIVATE , MODE_WORLD_READABLE , D MODE_WORLD_WRITEABLE , and MODE_MULTI_PROCESS Value is either 0 or a combination of , , D , and MODE_MULTI_PROCESS

Question 35

If no any folder like res/anim-, res/drawable-, res/layout-, res/raw-, res/xml- exist in the project. Which folders are required in the project anyway? (Choose two.)

A) res/anim/
B) res/drawable/
C) res/layout/
D) res/raw/
E) res/xml/

Question 36

Custom views and directional controller clicks. On most devices, clicking a view using a directional controller sends (to the view currently in focus) a KeyEvent with:

A) KEYCODE_DPAD_CENTER
B) KEYCODE_BUTTON_START
C) KEYCODE_CALL
D) KEYCODE_BUTTON_SELECT

Question 37

In a class extended PreferenceFragmentCompat. What method is used to inflate the given XML resource and add the preference hierarchy to the current preference hierarchy?

A) findPreference
B) getPreferenceManager
C) addPreferencesFromResource
D) setPreferenceScreen

Question 38

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 ) is set in this way: mViewModel.getTea().observe(this, this::displayTea); What will be a correct displayTea method definition?

A) private void displayTea()
B) private void displayTea(Tea tea)
C) private void displayTea(LiveData)
D) private void displayTea(LiveData)

Question 39

Assume that an app includes a default set of graphics and two other sets of graphics, each optimized for a different device setup: res/drawable/ Contains default graphics. res/drawable-small-land-stylus/ Contains graphics optimized for use with a device that expects input from a stylus and has a QVGA low-density screen in landscape orientation. res/drawable-ja/ Contains graphics optimized for use with Japanese. What happens if the app runs on a device that is configured to use Japanese and, at the same time, the device happens to be one that expects input from a stylus and has a QVGA low-density screen in landscape orientation?

A) Android loads graphics from res/drawable/
B) Android loads graphics from res/drawable-small-land-stylus/
C) Android loads graphics from res/drawable-ja/

Question 40

By adding a RoomDatabase .Callback to the room database builder RoomDatabase.Builder (method addCallback(RoomDatabase.Callback callback) ), we can: (Choose two.)

A) set the database factory
B) handle database first time creation
C) handle database opening
D) disable the main thread query check for Room

Question 41

Select 3 major components of the Room. (Choose three.)

A) @Entity
B) @Query
C) @RawQuery
D) @DAO
E) @WorkerThread
F) @Database

Question 42

Select a correct statement about PagedList.

A) PagedList is content-mutable. This means that new content can be loaded into an instance of PagedList and the loaded items themselves can change once loaded.
B) PagedList is content-immutable. This means that, although new content can be loaded into an instance of PagedList, the loaded items themselves cannot change once loaded.
C) PagedList is content-accidental. This means that new content can be loaded into an instance of PagedList and the loaded items themselves can be changed to accidental values randomly.

Question 43

As an example. Our MutableLiveData object, named mLapseTime , is not connected to a Room database, etc. How can we change the value in ?

A) mLapseTime.postValue("new String")
B) mLapseTime.setValue(1000l)
C) mLapseTime.changeValue(1000l)

Question 44

About queries in DAO classes. Room verifies the return value of the query such that if the name of the field in the returned object doesn't match the corresponding column names in the query response, Room alerts you in one of the following two ways: (Choose two.)

A) It gives a warning if no field names match.
B) It gives a warning if only some field names match.
C) It gives an error if no field names match.
D) It gives an error if only some field names match.

Question 45

Relative positioning is one of the basic building blocks of creating layouts in ConstraintLayout. Constraints allow you to position a given widget relative to another one. What constraints do not exist?

A) layout_constraintBottom_toBottomOf
B) layout_constraintBaseline_toBaselineOf
C) layout_constraintBaseline_toStartOf
D) layout_constraintStart_toEndOf

Question 46

In application theme style, flag windowNoTitle () indicates:

A) whether this window should have an Action Bar in place of the usual title bar.
B) whether there should be no title on this window.
C) that this window should not be displayed at all.
D) whether this is a floating window.
E) whether this Window is responsible for drawing the background for the system bars.

Question 47

@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?

A) a runtime error occurs instead of a compilation failure.
B) a compilation error occurs instead of a runtime failure.
C) both compilation error and runtime failure occurs.

Question 48

What is demonstrated by the code below?
// RawDao.kt @Dao interface RawDao {
   @RawQuery   
fun getUserViaQuery(query: SupportSQLiteQuery?): User?
}
// Usage of RawDao
...
val query =    
 SimpleSQLiteQuery("SELECT * FROM User WHERE id = ? LIMIT 1",       
arrayOf(sortBy))
val user = rawDao.getUserViaQuery(query)
...

A) A method in a Dao annotated class as a raw query method where you can pass the query as a SupportSQLiteQuery . A method in a Dao annotated class as a raw query method where you can pass the query as a SupportSQLiteQuery .
B) A method in a Dao annotated class as a query method.
C) A method in a RoomDatabase class as a query method. A method in a RoomDatabase class as a query method.

Question 49

For example, we have a BufferedReader reader, associated with the json file through InputStreamReader . To get a file data we can do this:

A) var line: String? try {    while (reader.readLine(). also { line = it } != null) {        builder.append(line)    }    val json = JSONObject(builder.toString())    return json } catch (exception: IOException) {    exception.printStackTrace() } catch (exception: JSONException) { }    while (reader.readLine(). also { line = it } != null) {
B) var line: JSONObject ?    while (reader.readJSONObject (). also { line = it } != null) {    while (reader.readJSONObject ().
C) } catch (exception: RuntimeException) { } catch (exception: ArrayIndexOutOfBoundsException) {

Question 50

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 "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".

Question 51

Each time your test invokes onView() , Espresso waits to perform the corresponding UI action or assertion until the following synchronization conditions are met: (Choose three.)

A) The message queue is empty.
B) The message queue is not empty.
C) There are some instances of AsyncTask currently executing a task.
D) There are no instances of AsyncTask currently executing a task.
E) Some developer-defined idling resources are not idle.
F) All developer-defined idling res

Question 52

A class that you create for managing multiple data sources. In addition to a Room database, this class could manage remote data sources such as a web server. It is about:

A) Activity/Fragment
B) ViewModel
C) Repository
D) Room database

Question 53

To run a debuggable build variant you must use a build variant that includes

A) minifyEnabled false in the build configuration
B) debuggable true or debuggable false in the build configuration
C) debuggable true in the build configuration

Question 54

When using an ImageView, ImageButton, CheckBox, or other View that conveys information graphically. What attribute to use to provide a content label for that View?

A) android:contentDescription
B) android:hint
C) android:labelFor

Question 55

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

A) android:contentDescription
B) android:hint
C) android:labelFor

Question 56

In a class PreferenceFragmentCompat . What method is called during onCreate(Bundle) to supply the preferences for this fragment. And where subclasses are expected to call setPreferenceScreen(PreferenceScreen) either directly or via helper methods such as addPreferencesFromResource(int) ?

A) onCreateLayoutManager
B) onCreatePreferences
C) onCreateRecyclerView
D) onCreateView

Question 57

Enable debugging on your device: If you are using the emulator, this is enabled by default. But for a connected device, you need to

A) enable transfer data from the device in usb connection options.
B) enable debugging in the device developer options.
C) enable connection in bluetooth options.

Question 58

In application theme style, flag windowActionBar () indicates:

A) whether the given application component is available to other applications.
B) whether action modes should overlay window content when there is not reserved space for their UI (such as an Action Bar).
C) whether this window's Action Bar should overlay application content.
D) whether this window should have an Action Bar in place of the usual title bar.

Question 59

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.
D) non of the above

Question 60

The Layout Inspector in Android Studio allows you to compare your app layout with design mockups, display a magnified or 3D view of your app, and examine details of its layout at runtime. When this is especially useful?

A) when your layout is built entirely in XML rather than runtime and the layout is behaving expectedly.
B) when your layout is built at runtime rather than entirely in XML and the layout is behaving unexpectedly.

Question 61

What is the placeholder tag used for?

A) To mark text that should not be translated.
B) To raise a translation priority to a higher level
C) To raise a quantity of translations for the string
D) To pick up and move sting translation from a different resource file

Question 62

To build a debug APK, you can open a command line and navigate to the root of your project directory. To initiate a debug build, invoke the assembleDebug task: gradlew assembleDebug This creates an APK named [module_name]-debug.apk in [project_name]/[module_name]/build/outputs/apk/ Select correct statements about generated file. (Choose all that apply.)

A) The file is already signed with the debug key
B) The file is already aligned with zipalign
C) You can immediately install this file on a device.
D) non of the above

Question 63

In application theme style, value statusBarColor () means

A) Color of text (usually same as colorForeground).
B) Shows a thin line of the specified color between the navigation bar and the app content. For this to take effect, the window must be drawing the system bar backgrounds with R.attr.windowDrawsSystemBarBackgrounds and the navigation bar must not have been requested to be translucent with R.attr.windowTranslucentNavigation. Corresponds to Window.setNavigationBarDividerColor(int).
C) The color for the status bar. If the color is not opaque, consider setting View.SYSTEM_UI_FLAG_LAYOUT_STABLE and View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN. For this to take effect, the window must be drawing the system bar backgrounds with R.attr.windowDrawsSystemBarBackgrounds and the status bar must not have been requested to be translucent with R.attr.windowTranslucentStatus. Corresponds to Window.setStatusBarColor(int).
D) The color for the navigation bar. If the color is not opaque, consider setting View.SYSTEM_UI_FLAG_LAYOUT_STABLE and View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION. For this to take effect, the window must be drawing the system bar backgrounds with R.attr.windowDrawsSystemBarBackgrounds and the navigation bar must not have been requested to be translucent with R.attr.windowTranslucentNavigation. Corresponds to Window.setNavigationBarColor(int).

Question 64

What method should we use with Notification.Builder to supply a PendingIntent to be sent when the notification is clicked?

A) setContentInfo
B) setContentIntent
C) setDeleteIntent

Question 65

"Set the activity content to an explicit view. This view is placed directly into the activity's view hierarchy. It can itself be a complex view hierarchy." This can be done by calling method:

A) findViewById
B) setContentView
C) setActionBar
D) setContentTransitionManager
E) setTheme

Question 66

In Android 8.0, API level 26, some APIs regarding notification behaviors were moved from Notification to NotificationChannel. For example, what should we use instead of NotificationCompat.Builder.setPriority() for Android 8.0 and higher?

A) NotificationChannel.setPriority()
B) NotificationChannel.setImportance()
C) NotificationCompat.Builder.setImportance()

Question 67

Choose the most correct statement.

A) Android is a closed source, Linux-based software stack created for a wide array of devices and form factors.
B) Android is a closed source, Windows-based software stack created for a wide array of devices and form factors.
C) Android is an open source, Linux-based software stack created for a wide array of devices and form factors.
D) Android is an open source software stack created for a highly limited array of devices and form factors.

Question 68

Which build options in the Build menu to choose to delete all intermediate/cached build files.

A) Make Module
B) Generate Signed Bundle / APK
C) Rebuild Project
D) Clean Project
E) Make Project

Question 69

RecyclerView is a subclass of ViewGroup and is a more resource-efficient way to display scrollable lists. Instead of creating a View for each item that may or may not be visible on the screen, RecyclerView:

A) creates a single list item and reuses it for visible content.
B) creates an unlimited number of list items and never reuses them
C) creates a limited number of list items and reuses them for visible content.
D) creates a single list item and never reuses it

Question 70

Working with Custom View. Once you define the custom attributes, you can use them in layout XML files just like built-in attributes. The only difference is that your custom attributes belong to a different namespace. Instead of belonging to the http://schemas.android.com/apk/res/android namespace, they belong to:

A) http://schemas.android.com/apk/res/[your package name]
B) http://schemas.android.com/apk/[your package name]
C) http://schemas.android.com/[your package name]

Question 71

Working with Custom View. To define custom attributes, we can add resources to our project. It is customary to put these resources into a file:

A) res/layout/attrs.xml
B) res/values/attrs.xml
C) res/raw/attrs.xml
D) res/xml/attrs.xml

Question 72

A content label sometimes depends on information only available at runtime, or the meaning of a View might change over time. For example, a Play button might change to a Pause button during music playback. In these cases, to update the content label at the appropriate time, we can use:

A) View#setContentDescription(int contentDescriptionResId)
B) View#setContentLabel(int contentDescriptionResId)
C) View#setContentDescription(CharSequence contentDescription)
D) View#setContentLabel(CharSequence contentDescription)

Question 73

If content in a PagedList updates, the PagedListAdapter object receives:

A) only one item from PagedList that contains the updated information.
B) one or more items from PagedList that contains the updated information.
C) a completely new PagedList that contains the updated information.

Question 74

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 ( element )
B) A Layer List ( element) with items android:id="@+id/progress" and android:id="@+id/background" inside it.
C) An element with android:id="@+id/progress" identifier

Question 75

An overridden method onCreateOptionsMenu in an Activity returns boolean value. What does this value mean?

A) You must return true for the menu to be displayed; if you return false it will not be shown.
B) You must return false for the menu to be displayed; if you return true it will not be shown.
C) You can return any value: the menu will be displayed anyway.

Question 76

If you are working with a Builder that creates a PeriodicWorkRequest to run periodically once within the flex period of every interval period. What statement is correct?

A) The repeat interval must be greater than PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS and the flex interval must be greater than PeriodicWorkRequest.MIN_PERIODIC_FLEX_MILLIS.
B) The repeat interval must be lower than or equal to PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS and the flex interval must be lower than or equal to PeriodicWorkRequest.MIN_PERIODIC_FLEX_MILLIS.
C) The repeat interval must be greater than or equal to PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS and the flex interval can be anything in relation to PeriodicWorkRequest.MIN_PERIODIC_FLEX_MILLIS.
D) The repeat interval must be greater than or equal to PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS and the flex interval must be greater than or equal to PeriodicWorkRequest.MIN_PERIODIC_FLEX_MILLIS.

Question 77

If you want get a debuggable APK that people can install without adb, in Android Studio you can:

A) Select your debug variant and click Build Bundle(s) / APK(s) > Build APK(s).
B) Click the Run button from toolbar
C) Select your debug variant and click Analyze APK.

Question 78

Android uses adapters (from the Adapter class) to connect data with View items in a list. There are many different kinds of adapters available, and you can also write custom adapters. To connect data with View items, the adapter needs to know about the View items. From what is extended the entity that is usually used in an adapter and describes a View item and its position within the RecyclerView?

A) RecyclerView.AdapterDataObserver
B) RecyclerView.ItemDecoration
C) RecyclerView.ViewHolder
D) RecyclerViewAccessibilityDelegate