单项选择题
A. Both the control files and the online redo log files are configured properly.
B. The control files are configured properly， but the online redo log files are not configured properly.
C. The online redo log files are configured properly， but the control files are not configured properly.
D. Neither the control files nor the online redo log files are configured properly.
单项选择题 YouaremaintainingyourOLTPdatabaseinOracle10g.Whileobservingtheperformanceofthedatabase，youfindthatthelogswitchoccursmorethanonceforevery20minutes，affectingthedatabaseperformance.Whichfactorisresponsibleforfrequentlogswitches？（）
单项选择题 YouaremaintainingyourdatabaseinOracle10g.YouhavesetthevalueoftheSTATISTICS_LEVELinitializationparametertoTYPICALandthevalueoftheFAST_START_MTTR_TARGETparameterto900seconds.Toincreasetheperformanceofthedatabase，youwanttodeterminetheoptimalsizeoftheonlineredologfiles.Whichtoolenablesyoutodeterminetheoptimalsizeoftheonlineredologfiles？（）
单项选择题 Inwhichscenariowillyoucreateasortedhashcluster？（）
