フリー問題

問題文

A bank runs an Exadata Database Service pair whose two halves sit in two different AWS Regions, and the engineer filling in the setup screen reaches two fields: the one naming how redo travels to the far half, and the one naming how strict the redo guarantee has to be. Which value does the first field allow, and which value does the second field show?

選択肢

1. That screen allows only the asynchronous transport and the acknowledgment it waits for is the exact rule.
2. That screen allows only the asynchronous transport and the acknowledgment it waits for is the relaxed rule.
3. That screen allows only the synchronous transport and the acknowledgment it waits for is the exact rule.
4. That screen allows only the synchronous transport and the acknowledgment it waits for is the relaxed rule.