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

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单项选择题

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

单项选择题

Which of the following tools should be used to display the location of unused physical partitions on a disk drive？（）

A. df -k
B. lsps
C. lslv -p
D. fileplace

单项选择题

Which of the following commands will only provide a snapshot of average memory usage for a process？（）

A. vmtune
B. ps au
C. iostat
D. rmss -m