フリー問題

問題文

A DBA opens the server parameter file of a three-instance Oracle RAC database and finds two entries for the same parameter, one prefixed with an asterisk and one prefixed with an instance identifier. Which statement explains how the instances read those two entries?

選択肢

1. The entry that carries the instance identifier applies to that one instance and the entry with the asterisk applies to every instance that has no entry of its own, and the file itself is shared by all of the instances of the cluster from a location that each of them can reach.
2. The entry that carries the instance identifier applies to that one instance and the entry with the asterisk applies to every instance that has no entry of its own, and each instance keeps its own copy of the file on the local disk of the node that it runs on.
3. The entry that carries the instance identifier is ignored unless the instance is started with a text parameter file, and the file itself is shared by all of the instances from a location that each of them is able to reach.
4. The entry with the asterisk always wins because it is evaluated last, and the file itself is shared by all of the instances of the cluster from a location that every one of them is able to reach.