A customer is installing an HMC-managed Power 720 with two partitions, one for Production the other for Testing. They plan to use the Testing partition only occasionally and want to minimize hardware. Which of the following meets these requirements?（）
A、Create a system profile for each partition. Assign all needed resources as 'required'.
B、Define all system resources as 'desired' on the Testing partition. Activate only as needed.
C、Create two shared processor pools. Assign the minimal I/O resources required for each partition to the shared pools.
D、Create both partitions with minimal 'required' resources, and optional resources as 'desired'. Activate each partition as necessary.
Which two statements are true regarding B-tree indexs（）
AThe leaf blocks in the index are doubly linked.
BThe leaf node stores a bitmap for each key value.
CThe rows with NULL value in key columns also have entries in the index.
DThe deletion of a row from the table causes a logical deletion in index leaf block and the space becomesavailable for the new leaf entry
Which of the following processor socket types would support an AMD processor?（）
AF
BLGA
C940
D775
E1155
CPU中，除了内部总线和必要的寄存器外，主要的两大部件分别是运算器和（ ）。
A、控制器
B、存储器
C、Cache
D、编辑器
目前常见的网络攻击活动隐藏不包括下列哪一种（）。
A、网络流量隐藏
B、网络连接隐藏
C、进程活动隐藏
D、目录文件隐藏
某公司采用100M宽带接入Internet，公司内部有15台PC机，要求都能够上网。另外有2台服务器对外分别提供Web和E-mail服务，采用防火墙接入公网，拓扑结构如下图所示。如果防火墙采用NAPT技术，则该单位至少需要申请（）个可用的公网地址。
A、1
B、2
C、3
D、4