ocp-96

QUESTION NO: 96
What is the purpose of the catalog command?
A. To review RMAN control file and recovery catalog metadata and ensure that it‘s correct
B. To delete RMAN backup-related metadata from the recovery catalog
C. To create metadata in the control file and the recovery catalog related to backup set pieces，
D. To create a report that lists database backups
E. To rebuild the recovery catalog
Answer: C

目录命令的目的是什么？

C. 创建与备份集片相关的控制文件和恢复目录中的元数据

元数据的定义为“有关数据的结构数据”， 例如某个数据库中的表和视图的个数及名称，某个表或者视图中
列的个数以及每一列的名称、数据类型、长度、精度、描述等，某个表上定义的约束，某个表上定义的索引
以及主键/外键的信息