在CORBA体系结构中,负责屏蔽底层网络通信细节的协议是______。A.IDLB.RPCC.ORBD.GIOP
进程P通过缓冲区K不断向n个进程Qi(1≤i≤n)发送消息,消息大小与缓冲区K一样。为了使每个接收进程都应该接收到与发送次序一样的消息序列,需要配置(23)。
计算N!的递归算法如下,求解该算法的时间复杂度时,只考虑相乘操作,则算法的计算时间T(n)的递推关系式为(55);对应时间复杂度为(56)。intFactorial(intn){//计算n!if(n<=i)returni;eisereturnn*Factorial(n-1);}(55)
数据库系统的数据独立性是指(20)。
若操作系统中有n个作业J
i
(i=1,2….,n),分别需要T
i
(i=1,2…,n)的运行时间,采用( )的作业调度算法可以使平均周转时间最短。
可行性分析的目的是在尽可能短的时间内用尽可能小的代价来确定问题是否有解。不属于在可行性分析阶段进行的工作是(20)。可行性分析不包括对待开发软件进行(21)分析。
在以下网络应用中,要求带宽最高的应用是(65)。
CIF视频格式的图像分辨率为(13)。
设循环队列Q的定义中有rear和len两个域变量,其中rear表示队尾元素的指针,len表示队列的长度,如图8—3所示(队列长度为3,队头元素为e)。设队列的存储空间容量为M,则队头元素的指针为(57)。
基本块内的优化为(25)。
设顺序存储的某线性表共有123个元素,按分块查找的要求等分为3块。若对索引表采用顺序查找方法来确定子块,且在确定的子块中也采用顺序查找方法,则在等概率的情况下,分块查找成功的平均查找长度为(52)。
按照压缩存储的思想,对于具有T个非零元素的M×N阶稀疏矩阵,可以采用三元组表存储方法存储,当T满足(45)关系时,这样做都有意义。
In a world where it seems we already have too much to do,and too many things to think about,it seems the last thing we need is something new that we have to learn. But use cases do solve a problem with requirements:with __________(71)declarative requirements it'S hard to describe steps and sequences of events. Use cases,stated simply,allow description of sequences of events that,taken together, lead to a system doing something useful.As simple as this sounds,this is important.When confronted only with a pile of requirements,it's often ___________(72) to make sense of what the authors of the requirements really wanted the system to do.In the preceding example,use cases reduce the ambiguity of the requirements by specifying exactly when and under what conditions certain behavior occurs;as such,the sequence of the behaviors can be regarded as a requirement. Use cases are particularly well suited to capturing these kind of requirements.Although this may sound simple,the fact is that ___________(73) requirement capture approaches,with their emphasis on declarative requirements and "shall" statements,completely fail to capture the ___________(74) of the system'S behavior.Use cases are a simple yet powerful way to express the behavior of the system in way that all stakeholders can easily understand. But,like anything,use cases come with their Own problems,and as useful as they are,they can be ___________(75).The result is something that is as bad,if not worse,than the original problem.Therein it'S important to utilize use cases effectively without creating a greater problem than the one you started with.
下列关于Armstrong公理系统的叙述中,错误的是______。
在一个长度为n的顺序表中向第i(0≤f≤n)个元素位置插入一个新元素时,需要从后向前依次后移(46)个元素。如果在每个位置上进行插入元素的概率相同,均为。则插入时的平均移动数为(47)。
在下列软件平台中,( )不是网络管理软件平台
逻辑覆盖标准主要用于 1.______ 。它主要包括条件覆盖、条件组合覆盖、判定覆盖、条件及判定覆盖、语句覆盖、路径覆盖等几种,其中除路径覆盖外最弱的覆盖标准是 2.______。
由于信用卡公司升级了其信用卡支付系统,导致超市的原有信息系统也需要做相应的修改工作,该类维护属于(34)。
在文件系统中,下列关于当前目录(工作目录)的叙述中,不正确的是(22)。
(13)既不是图像编码也不是视频编码的国际标准。
