多项选择题
A. by adding server instances to the cluster on an existing machine
B. by adding machines to host server for more clustered instances
C. by adding machines to the cluster to host the incremental server instances
D. by adding node managers to an existing machine
单项选择题 WhichstatementisTRUEabouttheCacheFactoryclass？（）
单项选择题 Whichfeature/offeringofOracleApplicationGridmakesitparticularlyeasytosignificantlyincreasetheperformanceofWeb-basedapplicationswithnocodechange？（）
单项选择题 WhywouldyouuseWebLogicDiagnosticsFramework（WLDF）insteadofOracleEnterpriseManager（OEM）（）