フリー問題

問題文

A new administrator is asked to describe what is running on the server once the database has been opened. Which statement separates the instance from the database correctly?

選択肢

1. The instance is the set of files that hold the data on disk and the database is the shared memory plus all the background processes.
2. The instance is the schema that owns the application tables and the database is the background processes that write to disk.
3. The instance is the shared memory area plus the background processes and the database is the group of files that hold the data on disk.
4. The instance is the network listener on the host and the database is the shared memory area that the client sessions attach to.