フリー問題

問題文

A replica has to survive a sudden power loss without ever applying the same transaction twice. Which property of release 8.0 provides that?

選択肢

1. That safety comes from the position update that the applying transaction unfortunately includes as well.
2. That safety comes from the detecting mode that the applying transaction unfortunately includes as well.
3. That safety comes from the heartbeat period that the applying transaction unfortunately includes as well.
4. That safety comes from the flow control that the applying transaction unfortunately includes as well.