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。
单选题包过滤防火墙通过{{U}} (68) {{/U}}来确定数据包是否能通过。
单选题计算机运行过程中,遇到突发事件,要求CPU暂时停止正在运行的程序,转去为突发事件服务,服务完毕,再自动返回原程序继续运行,这个过程叫做中断。发生中断的原因称为中断源,它是 (7) ,中断源都有规定的优先级别,中断屏蔽的作用是 (8) 。
单选题在面向对象软件开发过程中,采用设计模式 (48) 。
单选题一种代理服务器使用 (63) 技术,它可以把内部网络中的某些私有IP地址隐藏起来。
单选题程序设计语言一般都提供多种循环语句,例如实现先判断循环条件再执行循环体的while语句和先执行循环体再判断循环条件的do-while语句。关于这两种循环语句,在不改变循环体的条件下,______是正确的。
单选题以下关于算法与数据结构关系的描述中,说法正确的是 (57) 。
单选题在主存和CPU之间增加Cache的目的是 (7) 。
单选题下述的 (19) 属于CMM中的已管理级的关键过程域。
