單項選擇題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


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1.單項選擇題Which of the following phrases is TRUE regarding monitoring disk I/O with iostat?()

A. The iostat can only be run as the root user
B. There could be zero percent I/O wait and still be an I/O bottleneck
C. Any I/O wait time displayed in output of "iostat" is an indication of severe I/O bottlenecks 
D. Running "iostat" without any arguments/parameters is sufficient for resolving I/O bottlenecks

5.單項選擇題When monitoring a system using vmstat with an interval, which of the following conclusions should be drawn about the metrics under page pi and page po?()

A. The values do not include working storage.
B. The values do not include persistent storage.
C. The values include both persistent and working storage.
D. The values are not working or persistent storage.

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