Android Objective type Question and Answers

Android Objective type Question and Answers

1) Once installed on a device, each Android application lives in_______?
 a)device memory
 b)external memory
 c) security sandbox
 d)None of the above
Ans) c

2)Parent class of Activity?
 a)Object
 b)Context
 c)ActivityGroup
 d)ContextThemeWrapper
Ans) d

3)What are the Direct subclasses of Activity?
 a)AccountAuthenticatorActivity
 b) ActivityGroup
 c) ExpandableListActivity
 d) FragmentActivity
 e) ListActivity
 f) all the aove
Ans) f

4)What are the indirect Direct subclasses of Activity?
 a)LauncherActivity
 b)PreferenceActivity
 c) TabActivity
 d)All the above
Ans) d
5)Parent class of Service?
 a)Object
 b)Context
 c) ContextWrapper
 d)ContextThemeWrapper
Ans) c

6)What are the indirect Direct subclasses of Services?
 a) RecognitionService
 b) RemoteViewsService
 c)SpellCheckerService
 d)InputMethodService
Ans) d
7)Which component is not activated by an Intent?
 a)Activity
 b)Services
 c)ContentProvider
 d)BroadcastReceiver
Ans) c
8)When contentProvider would be activated?
 a)Using Intent
 b)Using SQLite
 c)Using ContentResolver
 d)None of the above
Ans) c
9)Which of the  important device characteristics that you should consider as you design and develop your application?
 a)Screen size and density
 b)Input configurations
 c)Device features
 d)Platform Version
 e)All of the above
Ans) e
10)Which are the screen sizes in Android?
 a)small
 b)normal
 c)large
 d)extra large
 e)All of the above
Ans) e
11)Which are the  screen densities in Android?
 a)low density
 b)medium density
 c)high density
 d)extra high density
 e)All of the above
Ans) e
12)You can shut down an activity by calling its _______ method
 a)onDestory()
 b)finishActivity()
 c)finish()
 d)None of the above
Ans) c
13)What is the difference between Activity context and Application Context?
 a) The Activity instance is tied to the lifecycle of an Activity.
    while the application instance is tied to the lifecycle of the application,
 b) The Activity instance is tied to the lifecycle of the application,
    while the application instance is tied to the lifecycle of an Activity.
 c) The Activity instance is tied to the lifecycle of the Activity,
    while the application instance is tied to the lifecycle of an application.
 d) None of the above
Ans) a
14)Which one is NOT related to fragment class?
 a)DialogFragment
 b)ListFragment
 c)PreferenceFragment
 d)CursorFragment
Ansa)d
15)Definition of Loader?
 a) loaders make it easy to asynchronously load data in an activity or fragment.
 b) loaders make it easy to synchronously load data in an activity or fragment.
 c) loaders does not make it easy to asynchronously load data in an activity or fragment.
 d) None of the above.
Ans) a
16)Characteristics of the  Loaders?
 a)They are available to every Activity and Fragment.
 b)They provide asynchronous loading of data.
 c)They monitor the source of their data and deliver new results when the content changes.
 d)They automatically reconnect to the last loader's cursor when being recreated after a configuration change. Thus, they don't need to re-query their data.
 e)All of the above.
Ans) e
17)How many ways to start services?
 a)Started
 b)Bound
 c)a & b
 d)None of the above.
Ans) c

18)If your service is private to your own application and runs in the same process as the client (which is common), you should create your interface by extending the ________class?
 a) Messenger
  b) Binder
  c) AIDL
  d)None of the above
Ans) b
19)If you need your interface to work across different processes, you can create an interface for the service with a ________?
  a)Binder
  b)Messenger
  c)AIDL
  d) b or c
Ans) d
20)AsyncTask allows you to perform asynchronous work on your user interface. It performs the blocking operations in a worker thread and then publishes the results on the UI thread.
  a)true
  b)false
Ans) a
21)Layouts in android?
 a)Frame Layout
 b)Linear Layout
 c)Relative Layout
 d)Table Layout
 e)All of the above
Ans) e
22) Dialog classes in android?
  a)AlertDialog
  b)ProgressDialog
  c)DatePickerDialog
  d)TimePickerDialog
  e)All of the above
Ans) e
23)If you want share the data accross the all applications ,you should go for?
  a)Shared Preferences
  b)Internal Storage
  c)SQLite Databases
  d)content provider
Ans) d
24)Difference between android api and google api?
  a)The google API includes Google Maps and other Google-specific libraries. The Android one only includes core android libraries.
  b)The google API one only includes core android libraries. The Android  includes Google Maps and other Google-specific libraries.
  c)None of the above.
Ans) a