Correct Answer : toast class
Explanation : An android toast provides feedback to the users about the operation being performed by them. It displays the message regarding the status of operation initiated by the user.
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..