正确答案: C

文件目录

题目：在操作系统文件管理中，通常采用______来组织和管理外存中的信息。

解析：C

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学习资料的答案和解析：

[单选题]●试题七阅读以下说明和C++代码，将解答写入答题纸的对应栏内。

include

解析：

●试题七

【答案】 (1)for(int i=start；i

(2)if(list［i］==key)

(3)cin$amp;>amp;$gt;A［pos］

(4)8 occurs 2 times in the list

(5)9 occurs 0 time in the list

【解析】数组下标从0开始，所以n次循环要在i=n-1时结束，而不是在i=n时结束。判断是否相等使用"=="，一个等号是赋值。将输入数字逐个赋给A的pos处的元素。8出现2次，注意结果中的times。9出现0次，注意结果中的time。

 

[单选题]●在Excel的A1单元格中输入函数“=ROUND(13.4，-1)”，按回车键后，Al单元格中的值为(51)。(51)

10

[单选题]A multicast router may receive thousands of multicast(71)every day for different groups. If a router has no knowledge about the membership status of the(72), it must broadcast all of these packets. This creates a lot of traffic and consumes(73). A better solution is to keep a list of groups in the network for which there is at least one loyal member.(74)helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the(75)packets destined for that group. This means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. A host or multicast router can have membership in a group.

packets

[单选题]操作员对某软件人机界面的以下评价意见中，（ ）并不是表扬。

完成每项任务的操作方法唯一，不会乱

[单选题]用户A与用户B通过卫星链路通信时，传播延迟为540ms，假设数据速率是64Kbit/s，帧长4000bit，若采用停等控制协议通信，则最大链路利用率为(22)；若采用后退N帧 ARQ协议通信，发送窗口为8，则最大链路利用率可以达到(23)。

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