which four are true about the tools used to administer Oracle database?

A)the Data Pump utility can be used to load data from text files.

B)SRVCTL can be used to shut down Oracle instances.

C)SQL* Plus can be used to create databases.

D)SQL*Plus can be used to startup Oracle instances.

E)DBCA can be used to upgrade databases.

F)RMAN can be used to startup Oracle instances.

1、通过 SRVCTL 命令来 start/stop/check 所有的实例：$srvctl start|stop|status database -d 2、start/stop 指定的实例：$ srvctl start|stop|status instance -d -i