多项选择题
A.You must shut down the database instance to perform the backups.
B.You must configure the Flash Recovery Area （FRA） for the database.
C.You can perform complete database backups without closing the database.
D.All the previous closed database backups including control files become invalid after you configure thedatabase to ARCHIVELOG mode.
单项选择题 You want to enable archiving on your database. Presently， the database is running inNOARCHIVELOG mode. Given below are the steps to accomplish the task in random order： 1：Shut down the instance. 2：Execute the ALTER DATABASE ARCHIVELOG command. 3：Start up the instance and mount the database. 4：Set the DB_RECOVERY_FILE_DEST initialization parameter to $ORACLE_HOME/dest_1. 5： Open the database. Which is the correct sequence of steps for accomplishing the task（）
单项选择题 You configured the Flash Recovery Area for your database. The database instance has been startedin ARCHIVELOG mode and the LOG_ARCHIVE_DEST_1 parameter is not set. What will be the implications on the archiving and the location of archive redo log files（）
多项选择题 You configured the Flash Recovery Area （FRA） for your database. The database instance is runningin ARCHIVELOG mode. The default location for the archived redo log files is the Flash Recovery Area. Which two files are removed automaticallyif the space is required in the FRA as per the retention policy（）