单项选择题
A.The extents in the undo tablespace retain data until the next full database backup.
B.The extents containing committed undo in the undo tablespace are not overwritten for at least 15minutes.
C.The extents containing committed data in the undo tablespace are not overwritten until the instance isshut down.
D.The extents containing committed undo in the undo tablespace are transferred to Flash Recovery Areabefore being overwritten.
单项选择题 View the Exhibit and examine the undo tablespace attributes. Your database instance is experiencing a large volume of transactions from non-DBA users in the last onehour. The undo tablespace UNDOTBS1 is full with transactions and no transaction was committed morethan one hour ago. The database has two more undo tablespaces. What happens to the new DML operations in this scenario（）
多项选择题 Whichtwostatementsaretrueregardingundotablespaces（）
多项选择题 Whichthreeoperationsrequireundodata（）