フリー問題

問題文

A raw copy of the data directory is taken with an ordinary file copy program and no special tool. Which condition makes that copy usable?

選択肢

1. The copy is usable only when it was taken after the neighbor flushing that the operator requested in advance.
2. The copy is usable only when it was taken after the backup lock that the operator requested in advance.
3. The copy is usable only when it was taken after the clean shutdown that the operator requested in advance.
4. The copy is usable only when it was taken after the clustered index that the operator requested in advance.