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單項(xiàng)選擇題

Which of the following commands should be used to monitor disk utilization during the time a system is experiencing a disk I/O performance problem？（）

A. istat
B. topas
C. vmstat
D. filemon

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單項(xiàng)選擇題

After running the vmstat command， which of the following would most likely cause the value in the blocked column to be unusually high？（）

A. Kernel thread
B. Too many users
C. Memory shortage
D. Network contention

單項(xiàng)選擇題

Which of the following commands is most useful in initially collecting data to determine a network performance problem？（）

A. ping
B. trace
C. ifconfig
D. lsattr

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