In a interview someone asked me this question. Suppose there are 4 activities in application. He wants back button to work normally on first three activities(i.e. going to previous screen on back button press); except the last.
He wanted that, when he press back button on fourth activity(screen), user should go to Home Activity(Starting Screen or first screen). But the contents on Home Activity should be same when user went from first screen to second screen. So I think, I can't use Intent, as it will create new instance of Starting Activity.