多项选择题
A. Backup of offline tablespaces.
B. Backup of read-only tablespaces.
C. Backup of system-critical tablespaces.
D. Backup of online， locally managed tablespaces.
E. Backup of read/write dictionary-managed tablespaces.
单项选择题 Inoneofyouronlinetransactionprocessing（OLTP）applications，mostusersfrequentlymodifythevalues，includingthekeyvalues，oftheapplicationtables.Someusersgenerateapplicationreportsbyusingmultipleapplicationtables.Whatisthebesttablestructurethatyoucanusetogainoptimalperformance？（）
单项选择题 Youhavebeenassignedtomanageasetofdatabases.ThepreviousDBAdidnotleaveyounotesregardingthestructureofeachofthedatabases.Whileanalyzinganinstance，younoticethatthesystemidentifier（SID）fortheinstanceissetto’+ASM’.Whatisthepurposeofthisinstance？（）
单项选择题 InanOracle10gdatabase，thein-memorystatisticsaregatheredatregularintervalsandusedtoperformgrowth-trendanalysisandcapacityplanningofthedatabase.Whichcomponentstoresthesestatistics？（）