Question 1

Which of the following permission is necessary for capturing geo-coordinates?
A) android.permission.ACCESS_LOCATION
B) android.permission.ACCESS_LOCATION_FINE
C) android.permission.ACCESS_FINE_LOCATION
D) All answers are incorrect

Accepted Answer

The permission necessary for capturing geo-coordinates is android.permission.ACCESS_FINE_LOCATION which allows the app to access precise location information. The other two options, android.permission.ACCESS_LOCATION and android.permission.ACCESS_LOCATION_FINE do not exist as valid permission options.

Question 2

Which of the following methods updates a ListView when an element is added to the data set?
A) notify( )
B) notifyAll( )
C) notifyDataSetChanged( )
D) notifyDataSetInvalidate( )

Accepted Answer

notifyDataSetChanged() is the method used to notify the ListView that the underlying dataset has changed and that it needs to update itself. This will cause the ListView to re-draw itself and display any new elements that were added to the dataset. notify() and notifyAll() are not methods that are used for updating a ListView. notifyDataSetInvalidate() is a method that is used to indicate that the entire dataset has become invalid and that the ListView should be reloaded, which is not necessary when a single element is added.

Question 3

Consider the following code: @Override public void onCreateContextMenu(ContextMenu menu, View v,  ContextMenuInfo menuInfo) {     super.onCreateContextMenu(menu, v, menuInfo);     menu.setHeaderTitle("Menu");     AdapterContextMenuInfo cmi = (AdapterContextMenuInfo) menuInfo;     menu.add(1, cmi.position, 0, "Open file");     menu.add(2, cmi.position, 0, "Save file"); } Which of the following best explains the code above?
A) The code inflates an xml file into menu items.
B) The code creates menu items for context menu programmatically.
C) The code assign actions to menu items.
D) The code opens a menu resource file, modifies it, and saves the changes.

Accepted Answer

The code creates menu items for context menu programmatically, based on the information provided in the menuInfo parameter. It assigns two actions: "Open file" and "Save file" to the menu items. The code does not inflate an xml file, open a resource file, or modify and save changes to a file.

Question 4

When is the intent resolution process triggered?
A) When the system receives an implicit intent to start an activity.
B) When an explicit intent starts a service.
C) When the system receives an explicit intent to start an activity.
D) When the application calls method startActivityIntentResolution.

Accepted Answer

The intent resolution process is triggered when the system receives an implicit intent to start an activity, as it needs to determine which component can handle the intent.

Question 5

Which of the following is required to allow Android Studio to interact with a custom view?
A) Provide a constructor that takes a Context and an AttributeSet object as parameters.
B) Provide a constructor that takes a Context object as parameter.
C) Extend class View.
D) Override method onDraw() of class View.

Accepted Answer

To allow Android Studio to interact with a custom view, we need to provide a constructor that takes a Context and an AttributeSet object as parameters. This is necessary to properly inflate the view and set its attributes. Extending class View and overriding method onDraw() may also be necessary depending on the requirements of the custom view, but they are not strictly required for interaction with Android Studio.

Question 6

Which of the following are primary pieces of information that are required to define in an implicit Intent?
A) An action to be performed and data to operate on.
B) An action to be performed and a category for additional information.
C) A Bundle for extra data.
D) A category of additional information and data to operate on.

Accepted Answer

The primary pieces of information required to define an implicit Intent are an action to be performed and data to operate on.

Question 7

Best practice to implement Google Maps is to use Webview that calls the online Google Map API.

Accepted Answer

The best practice to implement Google Maps is to use the Google Maps JavaScript API instead of a Webview. The JavaScript API provides more flexibility and functionality for customization and integration into web applications. Using a Webview can also lead to performance issues and may not be as responsive as the JavaScript API.

Question 8

Which of the following applies to the onDraw( ) method of class View? (Choose two)
A) It must be overridden if a customized drawing of a view is required.
B) It takes two parameters: a Canvas and a View.
C) It takes one parameter of type Canvas.
D) It uses the Canvas parameter to draw the border of the activity that contains it.

Accepted Answer

The onDraw() method of the View class must be overridden if custom drawing is required. It takes one parameter of type Canvas, which is used to draw the content of the view. It does not take two parameters or draw the border of the activity that contains it.

Question 9

Which of the following is correct about application file access in the Android system?
A) Generally, files are handled as dedicated resources per each application.
B) Files created by an application can be directly accessed by any application.
C) The content of a file created by an application cannot be accessed by any other application.
D) You can only access a file from within an Activity.

Accepted Answer

Generally, files are handled as dedicated resources per each application. This means that each application has its own private file system where it can create, read, and write files without interference from other applications. However, there are ways for applications to share files, such as using a content provider or sharing a file through the file system. But by default, files are only accessible to the app that created them.

Question 10

What are the main two types of threads in Android?
A) Main thread and worker threads.
B) Main thread and UI thread.
C) Activities and services.
D) Main thread and background process.

Accepted Answer

The main two types of threads in Android are the main thread (also known as the UI thread) and worker threads (also known as background threads). The UI thread is responsible for handling user input and updating the user interface, while worker threads handle long-running tasks that could potentially block the UI thread and cause the app to become unresponsive. Activities and services are not types of threads, and background processes could refer to a variety of different components (not just threads) that run in the background.

Question 11

GPS provider requires a physical device and cannot be tested on an Emulator.

Accepted Answer

A GPS provider requires access to location services on a physical device, which cannot be simulated on an emulator. Therefore, it cannot be fully tested on an emulator.

Question 12

Which of the following Android View sub-classes uses the WebKit rendering engine to display web pages?
A) PageView
B) WebView
C) MapView
D) HttpClient

Accepted Answer

WebView class uses the WebKit rendering engine to display web pages inside an Android app. PageView and MapView do not relate to displaying web pages and HttpClient is a class for making HTTP requests.

Question 13

What is the Android SDK version required for best performance of "Instant Run" feature of Android Studio?
A) 19 and above
B) 20 and above
C) 15 and above
D) 21 and above

Accepted Answer

According to the official documentation, Android SDK version 21 and above is required for the best performance of Instant Run feature in Android Studio.

Question 14

Which of the following is a NOT valid form of notification invoked by the NotificationManager?
A) A Flashing LED.
B) A persistent icon in the status bar.
C) A sound played.
D) A SMS sent.

Accepted Answer

The NotificationManager can display notifications through the flashing LED, a persistent icon in the status bar or by playing a sound, but it cannot send an SMS as a form of notification.

Question 15

Which of the following lines of codes adds zoom controls to a WebView?
A) webView.getSettings().setBuiltInZoomControls(true);
B) webView.getSettings().setZoomControls(true);
C) webView.getZoomSettings().setControls(CONTROLS.enabled);
D) Zoom controls are included by default in WebViews

Accepted Answer

The correct method to add zoom controls to a WebView is to use the `webView.getSettings().setBuiltInZoomControls(true)` method. This method enables the built-in zoom controls of the WebView. Option B is incorrect because `setZoomControls()` method does not exist in the `WebSettings` class. Option C is invalid syntax as `getZoomSettings()` method does not exist in the `WebView` class and `CONTROLS.enabled` is not a predefined constant. Option D is incorrect because zoom controls are not included by default in WebViews.

Question 16

Which of the following best explains the Android popup menus?
A) It is only displayed when the user presses the home button twice.
B) It displays a list of items vertically and is anchored to the view that invoked the menu.
C) It is a floating menu that appears when the user performs a long-click on an element.
D) It is the primary collection of menu items for an activity. It's where you should place actions that have a global impact on the app, such as "Search", "Compose email", and "Settings".

Accepted Answer

It displays a list of items vertically and is anchored to the view that invoked the menu.

Question 17

Which of the following best explains the Android option menus?
A) It is a popup menu that displays a list of items in a vertical list anchored to the view that invoked the menu.
B) It is a floating menu that appears when the user performs a long-click on an element. It provides actions that affect the selected content or context frame.
C) It is the primary collection of menu items for an activity where you should place actions that have a global impact on the app, such as "Search," "Compose email," and "Settings."
D) It is a type of List Activity with predefined headers and footers for special commands.

Accepted Answer

The Android option menu is the primary collection of menu items for an activity, used for actions that have a global impact on the app.

Question 18

Which of the following is true about method startActivity?
A) It starts a new activity and destroys the previous one.
B) It starts a new activity and sends it to the foreground.
C) It starts a new activity and resumes the previous one.
D) It starts a new activity in a paused mode.

Accepted Answer

The startActivity method starts a new activity and sends it to the foreground. The previous activity is still in the back stack and can be resumed when the new activity is finished or the user presses the back button. It does not destroy or pause the previous activity.

Question 19

Which of the following is true about the Dialog class? (Choose two.)
A) You can add a custom layout to a dialog using setContentView( ).
B) A dialog has a life-cycle independent of the Activity.
C) A dialog is displayed on the screen using method show( ).
D) It does not have a method to access the activity that owns it.

Accepted Answer

A dialog can have a custom layout added to it using the method setContentView(). It is displayed on the screen using the method show(). Both of these statements are true. The option B is false because the life-cycle of a dialog is dependent on the activity that owns it. The option D is also false because the Dialog class has a method getContext() that can be used to access the activity that owns it.

Question 20

Which of the following is mandatory for a Notification object to contain? (Choose three.)
A) A small icon
B) A detail text.
C) A notification sound
D) A title

Accepted Answer

The answer of Which of the following is mandatory for...

Exam 1: Android Application Development

Which of the following permission is necessary for capturing geo-coordinates?

Which of the following methods updates a ListView when an element is added to the data set?

When is the intent resolution process triggered?

Which of the following is required to allow Android Studio to interact with a custom view?

Which of the following are primary pieces of information that are required to define in an implicit Intent?

Best practice to implement Google Maps is to use Webview that calls the online Google Map API.

Which of the following applies to the onDraw( ) method of class View? (Choose two)

Which of the following is correct about application file access in the Android system?

What are the main two types of threads in Android?

GPS provider requires a physical device and cannot be tested on an Emulator.

Which of the following Android View sub-classes uses the WebKit rendering engine to display web pages?

What is the Android SDK version required for best performance of "Instant Run" feature of Android Studio?

Which of the following is a NOT valid form of notification invoked by the NotificationManager?

Which of the following lines of codes adds zoom controls to a WebView?

Which of the following best explains the Android popup menus?

Which of the following best explains the Android option menus?

Which of the following is true about method startActivity?

Which of the following is true about the Dialog class? (Choose two.)

Which of the following is mandatory for a Notification object to contain? (Choose three.)