Frequently Asked Question and their answers
Q1. What method you should override to use Android menu
system?
a. onCreateOptionsMenu()
b. onCreateMenu()
c. onMenuCreated()
d. onCreateContextMenu()
Answer: A
Q2. What Activity method you use to retrieve a reference to an
Android view by using the id attribute of a resource XML?
a. findViewByReference(int id);
b. findViewById(int id)
c. retrieveResourceById(int id)
d. findViewById(String id)
Answer: B
Q3. Which of the following is not an Android component (i.e. a
point from which the system can enter your application)?
a. Service
b. Activity
c. Layout
d. Content Provider
Answer: C
Q4. During an Activity life-cycle, what is the first callback method
invoked by the system?
a. onStop()
b. onStart()
c. onCreate()
d. onRestore()
Answer: C
Q5. Which configuration file holds the permission to use the
internet?
a. Layout file
b. Property file
c. Java source file
d. Manifest file
Answer: D
Q6. What does the following line of code achieve?
Intent intent = new Intent(FirstActivity.this,
SecondActivity.class );
a. Creates an hidden Intent
b. Creates an implicit Intent
c. Create an explicit Intent
d. Starts an activity.
Answer: D
Q7. Which of the following is NOT a valid usage for Intents?
a. Activate and Activity
b. Activate a Service
c. Activate a Broadcast receiver
d. Activate a SQLite DB Connection.
Answer: D
Q8. Which of the following is not a valid Android resource file
name?
a. mylayout.xml
b. myLayout.xml
c. my_layout.xml
d. mylayout1.xml
Answer: B
Q9. Which of these is not defined as a process state?
a. Non-visible
b. Visible
c. Foreground
d. Background
Answer: AQ10. What is the name of the folder that contains the R.java file?
a. src
b. res
c. bin
d. gen
Answer: D
Q11. What is a correct statement about an XML layout file?
a. A layout PNG image file
b. A file used to draw the content of an Activity
c. A file that contains all application permission information
d. A file that contains a single activity widget.
Answer: B
Q12. What does the src folder contain?
a. Image and icon files
b. XML resource files
c. The application manifest file
d. Java source code files
Answer: DQ13. Which file specifies the minimum required Android SDK
version your application supports?
a. main.xml
b. R.java
c. strings.xml
d. AndroidManifest.xml
Answer: D
Q14. What is the parent class of all Activity widgets?
a. ViewGroup
b. Layout
c. View
d. Widget
Answer: C
Q15.What is the name of the class used by Intent to store
additional information?
a. Extra
b. Parcelable
c. Bundle
d. DataStore
Answer: CQ16. Which is not included in the Android application framework?
a. WindowManager
b. NotificationManager
c. DialerManager
d. PackageManager
Answer: C
Q17.What Eclipse plugin is required to develop Android
application?
a. J2EE
b. Android Software Development Kit
c. Android Development Tools
d. Web Development Tools
Answer: C
Q18.You can create a custom view by extending class Activity.
a. True
b. False
Answer: BQ19.Which of these files contains text values that you can use in
your application?
a. AndroidManifest.xml
b. res/Text.xml
c. res/layout/Main.xml
d. res/values/strings.xml
Answer: D
Q20. What does the Android project folder “res/” contain?
a. Java Activity classes
b. Resource files
c. Java source code
d. Libraries
Answer: B
Q21. What does this code do?
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(android.net.Uri.parse("http://www.androidatc.com"));
startActivity(intent);
a. Starts a sub-activity
b. Starts a service
c. Sends results to another activity.
d. Starts an activity using an implicit intent.
Answer: DQ22. Which of the following is a Java call-back method invoked
when a view is clicked?
a. Detector
b. OnTapListener
c. OnClickDetector
d. OnClickListener
Answer: D
Q23.Which of the following is not an Activity lifecycle call-back
method?
a. onStart
b. onCreate
c. onPause
d. onBackPressed
Answer: D
Q24.Which method is used to close an activity?
a. Destroy( )
b. Finish( )
c. Stop( )
d. Close( )
Answer: BQ25. Which of the following Activity life-cycle methods is called once the
activity is no longer visible?
a. onStop
b. onPause
c. onDestroy
d. onHide
Answer: A
Q26. Which of the following is a correct Android Manifest
statement?
a. <uses-permission android:name =”android.Internet”/>
b. <uses-permission android:name =”android.Internet”></uses-permission>
c. <uses-permission android:name =”android.permission.Internet”>
d. <uses-permission android:name =”android. permission .Internet”/>
Answer: D
Q27.Which of the following is true about attribute
android:windowSoftInputMode of the <activity> tag in file
AndroidManifest.xml?
a. It specifies whether the window is in full screen or not
b. It adjusts how the main window of the activity interacts with keyboard
c. It adjusts how the window should be launched
d. It adjusts the window orientation
Answer: BQ28. Which of the following tools dumps system log messages
including stack traces when the device or emulator throws an
error?
a. DDMS
b. Logcat
c. Console
d. ADB
Answer: B
Q29. Javascript is enabled by default in a WebView
a. True
b. False
Answer: B
Q30. How to enable JavaScript in WebView?
a. myWebView. setJavaScriptEnabled(true);
b. myWebView.getJavaScriptSettings.setEnabled(true)
c. myWebView.getSettings().setJavaScriptEnabled(true);
d. Java script is always enabled in WebView
Answer: CQ31.What does the following code achieve?
Intent intent = new Intent(FirstActivity.this, SecondActivity.class);
startActivityForResult(intent);
a. Starts a browser activity
b. Starts a sub-activity
c. Starts an activity service
d. Sends results to another activity.
Answer: B
Q32. When using an implicit intent, what process does the system use to
know what to do with it?
a. Intent resolution
b. Intent declaration
c. Intent overloading
d. Intent transition
Answer: A
Q33.Which of the following is NOT true about the MenuItem interface?
a. The MenuItem instance will be returned by the Menu class add(...) method.
b. MenuItem can decide the Intent issued when clicking menu components.
c. MenuItem can display either an icon or text.
d. MenuItem can set a checkbox.
Answer: BQ34. Which of the following is correct about XML layout files?
a. In order to display a Ul defined in the XML layout file "main.xml", call the
setContentView method of the Activity with the parameter string “main.xml".
b. There is no distinction between implementation of the layout definition by code, or by
XML layout file.
c. In an Eclipse project using the ADT plugin, the XML layout file is found in the /res/layout
directory.
d. Layout information written in the XML layout file will be converted into code by the
Android platform when the screen is displayed.
Answer: C
Q35. The DalvikVM core libraries are a subset of which of the following?
a. Java ME
b. Java SE
c. Java EE
d. JAX-WS
Answer: B
Q36. Which of the following is correct about 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 file created by application cannot be accessed by any other
application.
d. You can only access a file from within an Activity.
Answer: AQ37. Which is the correct explanation of ListView?
a. It is necessary to use ListView as a set with ListActivity.
b. You cannot use a ListView when there is no information to be displayed.
c. When displaying a list of Strings using an ArrayAdapter class in ListView, you must save
the value in an ArrayList..
d. ListView has a function to display a list of uniquely defined Views other than TextView.
Answer: D
Q38. Which of following is incorrect about the Toast class?
a. You cannot set a custom layout for a Toast.
b. A Toast can only create by an Activity class
c. There is no need to close or hide a Toast, since it closes automatically.
d. A Toast is displayed for only one of the following periods:
Toast.LENGHT_SHORT or Toast.LENGTH_LONG
Answer: B
Q39. Which of the following is not a ContentProvider provided natively by
Android?
a. The contacts list
b. The telephone log
c. The bookmarks
d. The application list
Answer: DQ40. When creating a file using
android.content.Context.openFileOutput("test.txt", 0), where is the file
created?
a. /data/app/<package name>/files
b. /data/data/<package name>/files
c. /system/app/<package name>/files
d. /system/data/<package name>/files
Answer: B
Q41. Which of the following is incorrect about the LogCat tool?
a. A LogCat view is available as part of the ADT plugin of Eclipse
b. You can create a log in your application using Log.v(String, String)
c. Each log message has a tag
d. Only one of your application can create log entries, and it should be component class
(Activity, Service,...etc)
Answer: D
Q42. Which of the following information is not included in the Manifest file?
a. The activities contained in the application
b. The permissions required by the application
c. The application’s minimum SDK version required.
d. The handset model compatible with your application.
Answer: DQ43. Which method should you use to start a sub-activity?
a. startActivity(Intent intent)
b. startActivityForResult(Intent intent)
c. startService(Intent intent)
d. startSubActivity(Intent intent)
Answer: B
Q44. Which package of the following does not have classes needed for
Android network connections?
a. java.net
b. org.apache.http
c. android.location
d. android.net
Answer: C
Answer: BQ46. Which of the following tools creates certificates for signing Android
applications?
a. adb
b. logcat
c. keytool
d. certgen
Answer: C
Q47. Which manifest file permission you should add to allow your
application to read the device’s address book?
a. READ_ADDRESS_DATA
b. READ_PHONE_STATE
c. READ_PHONE_CONTACTS
d. READ_CONTACTS
Answer: D
Q48. You can create a custom view by extending class:
a. android.widget.View
b. android.widget.LinearLayout
c. android.view.View
d. android.content.Context
Answer: CQ49. In which Activity life-cycle method you should do all of your normal
static set up such as: creating views and bind data to lists?
a. onResume()
b. onStart()
c. onCreate()
d. onPause()
Answer: C
Q50. Which of the following lines of code starts activity Activity2 from a
current activity Activity1?
a. Intent intent = new Intent(this,new Activity2());
startActivity(intent);
b. Intent intent = new Intent(new Activity2());
startActivity(intent);
c. Intent intent = new Intent (Activity1.class,Activity2.class);
startActivity(intent);
d. Intent intent = new Intent(this,Activity2.class);
startActivity(intent);
Answer: d
Q51. Which of the following methods is called in an Activity when another
activity gets into the foreground?
a. onStop( )
b. onPause( )
c. onDestroy( )
d. onExit( )
Answer: BQ52.Which of the following attributes is used to set an activity screen to
landscape orientation?
a. screenorientation = landscape
b. screenOrientation=”landscape”
c. android:ScreenOrientation=“landscape”
d. android:screenOrientation=”landscape”
Answer: D
Q53. What is not true about the AndroidManifest.xml file?
a. It declares the views used within the application
b. It declares user permissions the application requires
c. It declares application components
d. It declares hardware and software features used within the application
Answer: A
Q54. If your application is throwing exception
android.content.ActivityNotFoundException, how to fix it?
a. Create a new activity Java sub-class.
b. Rename your activity
c. Create the activity layout
d. Add the activity to the AndroidManifest
Answer: DQ55. Consider the following code:
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(android.net.Uri.parse("http://www.androidatc.com"));
startActivity(intent);
Which of the following is correct about the code above?
a.
b.
c.
d.
It sends a result to a new Activity in a Bundle.
It will not compile without adding the INTERNET permission the Manifest file.
It starts any activity in the application that has a WebView in its layout.
When it is executed, the system starts an intent resolution process to start the right
Activity.
Answer: D
Q56. Which of the following is not true about <activity> tag in
AndroidManifest file?
a.
b.
c.
d.
Declares an activity that implements part of the application's visual user interface
Contained in <application> tag.
Declares a single hardware or software feature that is used by the application.
Has an attribute that specifies the name of the Activity sub-class that implements the
activity.
Answer: C
Q57. Which of the following Android View sub-classes uses the WebKit
rendering engine to display web pages?
a.
b.
c.
d.
PageView
WebView
MapView
HttpClient
Answer: BQ58. Which of the following lines of codes adds zoom controls to a
WebView?
a.
b.
c.
d.
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setZoomControls(true);
webView.getZoomSettings().setControls(CONTROLS.enabled);
Zoom controls are included by default in WebViews.
Answer: A
Q59. 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.
Answer: c
Q60. Which of the following best explains the Android context menus?
a. It is a popup menu displays a list of items in a vertical list that's 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. It's where you should place
actions that have a global impact on the app, such as "Search," "Compose email," and
"Settings."
d. It is a sub-menu of an options menu item.
Answer: BQ61. Which of the following applies a context menu on a ListView?
(Choose two)
a. ListView lv = getListView();
lv.registerForContextMenu()
b. ListView lv= getListView();
registerForContextMenu(lv);
c. ListView lv = (ListView) findViewById(R.id.list_view_id);
registerForContextMenu(lv)
d. getListView().setConextMenuEnabled(true)
Answer: B & C
Q62. 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.
b.
c.
d.
The code inflates an xml file into menu items
The code creates menu items for context menu programmatically
The code assign actions to menu items
The code Opens a menu resource file, modifies it, and saves the changes.
Answer: BQ63. Which of the following does NOT correctly describe interface
android.widget.Adapter?
a. It is an object that acts as a bridge between a View and underlying data for that view.
b. It provides access to the data items.
c. It provides access to deprecated ListView methods.
d. It is responsible for making a View for each item in the data set.
Answer: C
Q64.Which of the following methods updates a ListView when an element
is added to the data set?
a.
b.
c.
d.
notify( )
notifyAll( )
notifyDataSetChanged( )
notifyDataSetInvalidate( )
Answer: C
Q65. The values of which of the following classes cannot be mapped in a
Bundle object?
a. Parcelable
b. String
c. ArrayList
d. Context
Answer: D
Q66. Which of the following is true about method startActivity?
a.
b.
c.
d.
It starts a new activity and destroys the previous one
It starts a new activity and sends the previous one to the background.
It starts a new activity and pauses the previous one.
It starts a new activity in a paused mode.
Answer: BQ67. 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.
Answer: A
Q68. 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 startAcitivyIntentResolution.
Answer: A
Q69. Which of the following applies to the onDraw() method of class View?
(Choose two)
a. It must be overridden if a customize 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.
Answer: A & C
Q70. Which of the following you cannot achieve by creating your own View
sub-classes?
a. Create a completely new customized View type.
b. Combine a group of View components into a new single component.
c. Specify when to destroy an activity and all its views.
d. Override the way that an existing component is displayed on the screen.
Answer: CQ71. Which of the following is required to allow the Android Developer
Tools to interact with your 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.
Answer: A
Q72. What are the main two types of thread in Android?
a. Main thread and worker threads.
b. Main thread and UI thread.
c. Activities and services.
d. Main thread and background process.
Answer: A
Q73. Which of the following AsyncTask methods is NOT executed on the
UI thread?
a. onPreExecute()
b. onPostExecute()
c. publishProgress()
d. onProgressUpdate()
Answer: C
Q74. Which of the following is NOT true about method getWindow() of
class Dialog do?
a. It retrieves the current window for the activity.
b. It can be used to access parts of the Windows API.
c. It displays the dialog on the screen.
d. It returns null if the activity is not visual.
Answer: CQ75. 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.
Answer: A & C
Q76. 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.
Answer: D
Q77. Which of the following a Notification object must contain? (Choose
three)
a. A small icon.
b. A detail text.
c. A notification sound.
d. A title.
Answer: A , B & D.