单项选择题
Which of the following metrics provided by the iostat report is used to initially determine if a disk is I/O bound？（）
A. tin B. tout C. % idle D. % tm_act
单项选择题 WhichofthefollowingphrasesisTRUEregardingmonitoringdiskI/Owithiostat？（）
单项选择题 Whichofthefollowingtoolsshouldbeusedtodisplaythelocationofunusedphysicalpartitionsonadiskdrive？（）
单项选择题 Whichofthefollowingcommandswillonlyprovideasnapshotofaveragememoryusageforaprocess？（）
