单项选择题
A.They are the decimal numbers corresponding to the active process IDs.
B.They are the decimal numbers corresponding to the gid of the system group.
C.They are the decimal numbers corresponding to the block IDs of the boot sector.
D.They are the decimal numbers corresponding to the inodes of the system directories.
单项选择题 Because of system performance problems， a system administrator ran the iostat command. The following iostat output is provided： Which of the following issues can be derived from the output？（）
单项选择题 A system administrator ran the iostat command because of system performance problems. The following iostat output is provided： Based on the output， which of the following is insufficient？（）
单项选择题 Asystemadministratorismonitoringasystemthathasrecentlyshownadecreaseinperformance.TheadministratorsuspectsthereisanoverloadoftrafficonasingleEthernetadapter.WhichofthefollowingcommandsisbesttoidentifyapossibleoverloadoftheEthernetadapter？（）