单项选择题
A. Battery needs to be replaced
B. Light switch is turned off
C. Smart cable is disconnected
D. UPS needs a firmware update
多项选择题 Several reports are logged stating that an application server is performing slowly. During the investigation, the administrator notices that the hard drives on the server appear to have a high level of activity. Which items should the administrator monitor using performance monitoring tools?（）
单项选择题 Afteracriticalservicefailureoccurstheserverkeepsrebootingeveryfifteenminutesnotgivinganadministratorenoughtimetotroubleshootthefailure.Whichofthefollowingdoesthe administratorneedtodotoallowenoughtimetoworkonthesystemtotroubleshoottheproblem？（）
单项选择题 Aserverhasaprocessorthatallowsittocalculatetwoapplicationsatthesametime.Whichofthe followingdescribesthiscapabilityoftheprocessor？（）