多项选择题
In which three cases does a checkpoint occur？ （）
A.Every three minutes. B.When a log switch occurs. C.When forces by an administrator. D.When a tablespace is taken offline normal. E.When the redo buffer is one-third full.
单项选择题 Whatistrueregardingdirect-loadinsert？（）
多项选择题 AwebbrowsercanconnectdirectlytoanOracleserverusingwhichtwo？（）
单项选择题 WhichRMANcommanddoyouusetoverifythattheRMANrepositoryinformationissynchronizedwiththeactualfilesthatexistondisk？（）
