Correct Answer : Context.startService()
Explanation : Context.startService() : The Intent object is passed to this method to initiate a service or deliver new instructions to an ongoing service.
Correct Answer : Fragments
Explanation : In android mini-activities are also known as Fragments
Correct Answer : startActivityForResult()
Explanation : startActivityForResult() should use when need to pass data back from an activity.
Correct Answer : onCreate() callback
Explanation : Android system initiates its program with in an Activity starting with a call on onCreate() callback method..