With regard to the drivers behind Application Grid based computing， consider the following statements and indicate which is TRUE:// （） I. data center complexity leads to lack of predictability making it difficult if not impossible to guarantee quality of service II. data centers must do more with less and find a way to better utilize existing capacity III. growth means added complexity
A、 I and II
B、 I and III
C、 II and III
D、 I， II and III
Which two statements are TRUE regarding Coherence Indexes ？ （）
Aindexes are maintained by cache entry ownes
Ban application should not suggest an index that another aplication had suggested
Cindexes cannot be sorted
Deach application using Coherence may suggest the same set of indexes when it starts
一般风速的轻负荷区架空线路相隔多少档杆数交替设立防凌杆（）。
A、8
B、12
C、16
D、20
A modem is set up for a remote TTY connection that will become the system console. How should one verify that the console is enabled as the system console after the next reboot？（）
A、lscons -b
B、lscons -d
C、lscons -s
D、swcons /dev/tty0
直流浮充供电系统可有以下作用：（）
A、后备电源
B、平滑滤波
C、调节系统电压
D、高阻配电
RJ-45是8芯线，通常只使使用（）芯。
A、2
B、3
C、4
D、5
