Correct Answer : Android Package Kit
Explanation : An APK is a short form of the Android Package Kit. An APK file is the file format used to install the applications on the android operating system.
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..