如果输入掩码设置为“L”，则在输入数据的时候，该位置上可以接受的合法输入是（　　）。

A、任意符号

B、必须输入字母A～Z

C、必须输入字母或数字

D、可以输入字母、数字或空格

You perform the following activities during the database upgrade from Oracle Database 10g to Oracle Database 11g: 1. Capture plans for a SQL workload into a SQL Tuning Set (STS) before upgrade. 2. Load these plans from the STS into the SQL plan baseline immediately after the upgrade. What is the reason for performing these activities? （）

A、to minimize plan regression due to the use of a new optimizer version

B、to completely avoid the use of new plans generated by a new optimizer version

C、to prevent plan capturing when the SQL statement is executed after the database upgrade

D、to keep the plan in the plan history so that it can be used when the older version of the optimizer is used

以下内容哪个是路由表中所不包含的（）。

A、目标地址

B、源地址

C、下一跳

D、子网掩码

关于遮罩动画说法正确的是（）

A、必须在遮罩做动画效果

B、必须在被遮罩做动画效果

C、在遮罩和被遮罩层都可以做动画效果

D、在遮罩和被遮罩层都要做动画效果

A company plans to deploy a two-enclosure, 23-core Power 780 system with AIX, IBM i and Linux in thefollowing configuration: 3 AIX partitions with dedicated network and disk adapters; 1 native IBM i partition acting as a host1 hosted IBM i partition; 2 hosted Linux partitions. Which configuration will provide boot disk capability to all partitions?（）

A、Use dual-split backplane in both enclosures for the three AIX partitions and the IBMi partition.

B、Put each partition on a dedicated controller using the triple-split backplane option in both enclosures.

C、Use the triple-split backplane option in one enclosure for the AIX partitions, and the default dual-split backplane for the IBMi partition in the second enclosure.

D、Use the triple-split backplane option in one enclosure for the AIX partitions, and the non-split backplane mode in the second enclosure for the IBMi hosting partition.

以下关于逐帧动画和补间动画的说法正确的是（）

A、两种动画模式都必须记录完整的各帧信息

B、前者必须记录各帧的完整记录，而后者不用

C、前者不必记录各帧的完整记录，而后者必须记录完整的各帧记录

D、以上说法均不对