[单选题]所谓“全双工”是指______。
正确答案 :A
在两个节点之间可同时逆向传输两个数据帧
[多选题]在UNIX系统中,若文件File2的权限是511,则表示
正确答案 :AD
文件属主可执行File2
同组用户可执行File2
解析:AD
[单选题]交换机命令可使用缩写形式,在Switch#模式下,键人con,则表示——。
正确答案 :C
configure
解析:解析:在Switch#模式下,以con开头的命令只有configure。故选C)。
[单选题]在程序测试中,用于检查程序模块或子程序之间的调用是否正确的静态分析方法是______。
正确答案 :D
接口分析
解析:解析:静态错误分析主要用于确定在源程序中是否有某类错误或者危险结构,包括:类型和单位分析——为了强化对源程序中数据类型的检查,在程序设计语言中扩充一些新的数据类型。
[单选题]In developing a hospital database, it is determined that on the average, each patient will have 6 treatments during a hospital stay.The average length of a stay is three days.The hospital has 1000 beds.There are on the average 800 patients occupying beds each day.The relationship between PATIENT and TREATMENT is 1: M.The relationship between PATIENT and BED is 1:1, conditional.If treatment record occurrences are archived as soon as a patient is discarded from the hospital, how many occurrences of the TREATMENT records will be stored in the TREATMENT database file on the average?
正确答案 :D
1,600
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