Android Programming and Technical Programming Technical

What are the indirect sub classes of Activity class?
i. ActionBarActivity
ii. LauncherActivity
iii. PreferenceActivity
iv. TabActivity

Options
1) i
2) ii & iii
3) i, ii & iii
4) All of above

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Android Other Question

Which of the following are appropriate for saving the state of an android applications?

Options
1) Activity.onFreeze()
2) Activity.onStop()
3) Activity.onPause()
4) Activity.onDestroy()
What is activity manager in android?

Options
1) Activity manager is used to monitor and manage activity stack.
2) we can use activity manager to retrieve information about tasks that user has visited recently, information about currently running processes, information about particular task that is currently running, etc.
3) both options are true
4) none