フリー問題

問題文

A configuration run must restart a daemon only when its configuration file actually changed. Which arrangement achieves that?

選択肢

1. Trigger the restart from a plain task so that it fires only when the host fact cache reports a change.
2. Trigger the restart from a plain task so that it fires only when the file copy step reports a change.
3. Trigger the restart from a conditional handler so that it fires only when the host fact cache reports a change.
4. Trigger the restart from a conditional handler so that it fires only when the file copy step reports a change.