問題文
An architect explains that one database can be associated with more than one instance in some configurations. Which description of that relationship is accurate?
選択肢
- A single set of physical files can be copied to several servers so that each server keeps its own private version of the same data.
- A single set of database files can be mounted and opened by several instances running on different servers at the same time.
- A single instance can be split into several smaller instances so that each one serves a different group of the application users.
- A single instance can mount and open several independent sets of database files at the same time on one server.