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Android Interview Questions For Freshers

Android Interview Questions For Freshers

 Android Interview Questions For Freshers

Android Interview Questions For Freshers and Experience

How many activity call backs methods in android ?
[showhide type="linkIshand11" more_text="Show Answer" less_text="Hide Answer"]Answer :  six - onCreate(), on Start(), on Resume(), onPause(), onStop() and onDestroy()[/showhide]

 

Oncreate() receives parameters of savedInstancestate, which is ______ object

[showhide type="linkIshand21" more_text="Show Answer" less_text="Hide Answer"]Answer: Its a Bundle Object which contains the acivities previously saved state.[/showhide]

 

If activity has never existed before, the value of Bundle object is ?

[showhide type="linkIshand31" more_text="Show Answer" less_text="Hide Answer"]Answer: Null[/showhide]

 

Which call back methods are called immediately after onCreate() method finishes ?

[showhide type="linkIshand41" more_text="Show Answer" less_text="Hide Answer"]Answer: onStart() and onResume()[/showhide]

 

Which call back method initializes the code that maintains UI(User Interface)

[showhide type="linkIshand51" more_text="Show Answer" less_text="Hide Answer"]Answer: onstart() method[/showhide]

 

In what stage users interacts with app ?

[showhide type="linkIshand61" more_text="Show Answer" less_text="Hide Answer"]Answer: onResume() state[/showhide]

 

When interruption events happens like receiving a phone call or screen turnoff, which callback method is called ?[showhide type="linkIshand71" more_text="Show Answer" less_text="Hide Answer"]Answer: onPause() [/showhide]

 

If user leaving activity, which callback method is called[showhide type="linkIshand81" more_text="Show Answer" less_text="Hide Answer"]Answer: onPause()[/showhide]

 

If activity is no longer visible to user, which callback methods is called by system[showhide type="linkIshand91" more_text="Show Answer" less_text="Hide Answer"]Answer: onStop()[/showhide]

On which callback method instance, usually saves information to database[showhide type="linkIshand101" more_text="Show Answer" less_text="Hide Answer"]Answer: onStop()[/showhide]

 

Which callback method is called while activity been destroyed ?[showhide type="linkIshand111" more_text="Show Answer" less_text="Hide Answer"]Answer: onDestroy()[/showhide]

 

To start new activity which callback method is called?[showhide type="linkIshand121" more_text="Show Answer" less_text="Hide Answer"]Answer: startActivity() or startActivityForResult()[/showhide]

 

Which object as to pass in startActivity() or startActivityForResult() ?[showhide type="linkIshand124541" more_text="Show Answer" less_text="Hide Answer"]Answer: Intent object[/showhide]

 

Why Intent object is used ?[showhide type="linkIshand131" more_text="Show Answer" less_text="Hide Answer"]Answer: To specify exactly to start an activity or action to perform[/showhide]

 

Why startActivityForResult() is used ?[showhide type="linkIshand141" more_text="Show Answer" less_text="Hide Answer"]Answer:If we want result back from an activity. Ex : If user selects contact number from list of Contacts, When its ends, it has to returns the contact number which as selected.[/showhide]

 

Which call back method is called when user presses Back Button ?[showhide type="linkIshand151" more_text="Show Answer" less_text="Hide Answer"]Answer: finish() method[/showhide]

 

Activity is recreated after it previously destroyed, we can recover saved state from ?[showhide type="linkIshand161" more_text="Show Answer" less_text="Hide Answer"]Answer: Bundle[/showhide]

 

For Restoring the state, we can implement __________ or ___________[showhide type="linkIshand171" more_text="Show Answer" less_text="Hide Answer"]Answer: onCreate or onRestoreInstanceState(). In onRestoreInstanceState() system calls after onStart() method.[/showhide]

 

Snippet for Email Message

Intent intent = new Intent( Intent.ACTION_SEND);

intent.putextra(Intent.EXTRA_EMAIL, recipentArray);

startActivity(intent)

 

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