单项选择题 Anadministratorhasamalfunctioninguninterruptiblepowersupply（UPS）.Whichofthefollowingis theMOSTlikelycauseoftheproblem？（）

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？（）