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单选题
In an iostat report， which of the following options best describes the value of % iowait？（）
A
The amount of time taken to service an I/O interrupt
B
The percentage of time CPU（s） are waiting for page ins
C
The percentage of time the CPU9（s） are waiting on network
D
The percentage of time the CPU（s） are waiting for outstanding disk I/O requests
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In an iostat report， which of the following options best describes the value of % iowait？（）A、 The amount of time taken to service an I/O interruptB、 The percentage of time CPU（s） are waiting for page insC、 The percentage of time the CPU9（s） are waiting on networkD、 The percentage of time the CPU（s） are waiting for outstanding disk I/O requests
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考题
单选题In an iostat report， which of the following options best describes the value of % tm_act？（）A
The total CPU usage for this driveB
The bandwidth utilization of the indicated driveC
It can best be represented by the equation （%iowait - %ioidle）D
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考题
单选题Which of the following commands should be used to show the percentage of time that any given disk was busy？（）A
psB
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考题
单选题What best describes processing delay？（）A
the time required from receipt of the incoming frame， until the frame/packet has been queued for transmissionB
the time taken for a single packet to traverse the physical medium from one end to the otherC
the time taken to place a frame on the physical medium for transportD
the time spent for a packet to reside in the output queue of a router
考题
单选题Which of the following phrases is TRUE regarding monitoring disk I/O with iostat？（）A
The iostat can only be run as the root userB
There could be zero percent I/O wait and still be an I/O bottleneckC
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
考题
单选题我希望没有让你久等。（）A
I hope I have not kept you waiting for long.B
I hope I have not kept you waiting for a short time.C
I hope I have not kept you waiting for a while.D
I hope I have not kept you waiting for a little time.
考题
单选题Which of the following metrics provided by the iostat report is used to initially determine if a system is I/O bound？（）A
% idleB
% sysC
% userD
% iowait
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Locks competitors out of account
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