单项选择题
A. It contains data till the last backup
B. It contains all data from target database until the current time
C. It contains all data from only the committed transactions in the target database
D. It contains all data except that which is used by the transactions in the current online redo file of target database
多项选择题 ThedatabaseisconfiguredinARCHIVELOGmodeandregularcompletedatabasebackupsaretaken.ThelossofwhichtwotypesoffilesmayrequirearecoverywiththeRESETLOGSoption？（）
单项选择题 Your database interface is running. A user SCOTT starts a SQL *Plus session， and issues the following query： SQL> SELECT * FROM sales； Which process would retrieve the result from the database and return it to the client program？（）
多项选择题 YouwanttoperformanRMANbackupofdatabaseasacopy.Whichtwofactorswillyouconsiderwhileperformingthebackupoperation？（）