单项选择题 An administrator is beginning a set of failover tests. The administrator would like to have clean log files foreach test. Which command will achieve this？（）

单项选择题 Acustomerneedstotestthefailovercapabilitiesoftheircluster.WhichofthefollowingAIXcommands，whenissuedfromthecommandline，willsimulateanodecrashandcausetheclusterresourcegrouprunningonthatservertofailovertoanothernode？（）

单项选择题 AnadministratorplanstoapplyafixpacktothePowerHAsoftwareusingarollingmigration.Atwhatstageofthemigrationisaclusterverificationsupported？（）