单选题在采用结构化方法进行了系统分析时,根据分解与抽象的原则,按照系统中数据处理的流程,用( )来建立系统的逻辑模型,从而完成分析工作。
单选题极限编程(XP)包含了策划、设计、编程和测试四个活动,其十二个最佳实践中的“持续集成”实践在 (31) 活动中进行。
单选题Cache容量为64块,采用组相联方式映像,字块大小为128个字,每4块为一组。若主存容量为4096块,且以字编址,则主存区号应为{{U}} (5) {{/U}}位。
单选题模式R(A,B,C,(A,C)→B,(A,B)→C,B→C)属于最高范式的是 (43) 。
单选题
单选题已知一棵二叉树的前序序列和中序序列分别为ABDGHCEFI和GDHBAECIF,则该二叉树的后序序列为______。
单选题对高级语言源程序进行编译的过程可以分为多个阶段,分配寄存器的工作在______阶段进行。
单选题OMT是一种对象建模技术,它定义了三种模型,其中 (50) 模型描述了与值的变换有关的系统特征,通常可用 (51) 来表示。
单选题使用Spooling系统的目的是为了提高______的使用效率。
A.操作系统
B.内存
C.CPU
D.I/O设备
单选题______从二叉树的任一节点出发到根的路径上,所经过的节点序列必须按其关键字降序排列。 A.二叉排序树 B.大顶堆 C.小顶堆D.平衡二叉树
单选题For nearly ten years, the Unified Modeling Language (UML) has been the industry standard for visualizing, specifying, constructing, and documenting the (71) of a software-intensive system. As the (72)standard modeling language, the UML facilitates communication and reduces confusion among project (73)The recent standardization of UML 2.0 has further extended the language's scope and viability. Its inherent expressiveness allows users to (74)everything from enterprise information systems and distributed Web-based applications to real-time embedded systems. The UML is not limited to modeling software. In fact, it is expressive enough to model (75) systems, such as workflow in the legal system, the structure and behavior of a patient healthcare system, software engineering in aircraft combat systems, and the design of hardware. To understand the UML, you need to form a conceptual model of the language, and this requires learning three major elements: the UML's basic building blocks, the rules that dictate how those building blocks may be put together, and some common mechanisms that apply throughout the UML.
单选题已知文法G2=(VT=a,',',(,),VN=S,L),S,P),其中P为,S→(L)|aL→L,S|S(a,a)是L(G2)的句子,这个句子的分析树是(28)。
单选题
单选题利用逐点插入法建立序列(49,73,43,85,75,21,35,45,65,31)对应的二叉排序树后,查找元素35要进行 (2) 次元素间的比较。
单选题在UML类图中,类与类之间存在关联(Association)等关系。关联关系的标准UML图形表示是{{U}}(42){{/U}}。
单选题向一个长度为n的顺序表中第i个元素(0≤i≤n)位置插入一个新元素时,需要从后向前依次后移 (32) 个元素。
单选题Windows98/XP系统支持的下列网络协议中,用于连接NetWare网络的是
单选题 (71) analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the (72) for designing and constructing an improved system. (73) is such a technique. The emphasis in this technique is process-centered. Systems analysts draw a series of process models called (74) . (75) is another such technique that integrates data and process concerns into constructs called objects.
单选题当采用标准UML构建系统类模型(Class Model)时,若类B除具有类A的全部特性外,类B还可定义新的特性以及置换类A的部分特性,那么类B与类A具有 (46) 关系;若类A的对象维持类B对象的引用或指针,并可与类C的对象共享相同的类B的对象,那么类A与类B具有 (47) 关系。