フリー問題

問題文

A payments team must not lose a committed transaction if the primary instance fails inside the region. Which configuration meets that requirement, and what does the service do to achieve it?

選択肢

1. A refreshable clone in the region, which receives redo synchronously so that a commit waits for the clone to acknowledge it.
2. A cross region standby, which receives redo synchronously so that a commit waits for the remote region to acknowledge it.
3. A local standby, which receives redo synchronously so that a commit waits for the standby to acknowledge it.
4. A local backup copy peer, which receives redo synchronously so that a commit waits for its acknowledgment.