单项选择题
A.recover the database until April 10
B.recover the database until April 15
C.recover the database until 22 7：59 a.m.
D.recovery is not possible； manually re-create the object
单项选择题 Consider the following scenario： You have a directory， data， under the disk group tdgroup A. You want to create an alias for one of the data files and you execute the following command： ALTER DISKGROUP tdgroupA ADD ALIAS ’+tdgroupA/data/datafile.dbf’ FOR ’+tdgroupA. 231.45678’； Which task would be accomplished by the command？（）
单项选择题 WhichbackgroundprocessdoesAutomaticSharedMemoryManagementusetocoordinatethesizingofmemorycomponents？（）
单项选择题 You work as a database administrator for Certkiller .com. You received the following error while working on your database： ORA-01555： snapshot too old In which situation would you receive such an error？（）
