你可能感兴趣的试题

进程的五态模型包括运行状态、活跃就绪状态、静止就绪状态、活跃阻塞状态和静止阻塞状态。针对图3-4的进程五态模型，为了确保进程调度的正常工作，（a）、（b）和（c）的状态分别为（）。

某Windows XP计算机安装无线网卡后，用于添加无线网络的“无线网络属性‘关联’”选项卡配置界面如图3-2所示。若“网络验证（A）”项的值选择为“开放式”，则“数据加密（D）”项可供选择的值有“已禁用”和“（）”。

某指令流水线由5段组成，各段所需要的时间如图3-1所示。连续输入10条指令时的吞吐率为（）。

在Windows操作系统中，运行netstat-r命令后得到如图3-8所示的结果。图3-8中224.0.0.0是一个（）。

设关系R和S的元数分别为2和3，那么，R＞_1＞2＜S与（）等价。

图3-6示意的（）设计模式，定义对象间的一种一对多的依赖关系，当一个对象的状态发生改变时，所有依赖于它的对象都得到通知并被自动更新。

某企业职工和部门的关系模式如下所示，其中部门负责人也是一名职工。职工（职工号，姓名，年龄，月工资，部门号，电话，办公室）部门（部门号，部门名，负责人代码，任职时间）查询每个部门中月工资最高的“职工号”的SQL查询语句如下：（）。

已知3个类O、P和Q，其中，类O由类P的1个实例和类Q的1个或多个实例构成。能够正确表示类O、P和Q之间关系的UML类图是（）。

某商场的部门、员工和商品3个实体之间的关系如图3-7所示。假设每个部门有若干名员工，每种商品只能由一个部门负责销售，那么部门到员工、部门到商品之间分别存在（）的联系。

对于以下编号为①、②、③的正规式，说法正确的是（）。
①（aa*|ab）*b
②（a|b*|aa）*b
③（a|b）*b

Object-oriented analysis (OOA) is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is (71) . It determines how the various results are computed by the product and presents this information in the form of a (72) and associated scenarios. The second is (73) , which determines the classes and their attributes, then determines the interrelationships and interaction among the classes. The last step is (74) , which determines the actions performed by or to each class or subclass and presents this information in the form of (75) .

Object-oriented analysis (OOA) is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is (71) . It determines how the various results are computed by the product and presents this information in the form of a (72) and associated scenarios. The second is (73) , which determines the classes and their attributes, then determines the interrelationships and interaction among the classes. The last step is (74) , which determines the actions performed by or to each class or subclass and presents this information in the form of (75) .

斐波那契(Fibonacci)数列可以递归地定义为：

用递归算法求解F(6)时需要执行 (61) 次“+”运算，该方法采用的算法策略是 (62) 。

某工程计划如图3-5所示，各个作业所需的天数如表3-3所列，设该工程从第0天开工，则作业I最迟应在第（）天开工。
图3-5

图3-3中的程序由A、B、C、D和E等5个模块组成，表3-1模块之间的接口表中描述了这些模块之间的接口，每一个接口有一个编号。此外，模块A、D和E都要引用一个专用数据区。那么A和D之间耦合关系是（）。

表3-1 模块之间的接口表

Object-oriented analysis (OOA) is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is (71) . It determines how the various results are computed by the product and presents this information in the form of a (72) and associated scenarios. The second is (73) , which determines the classes and their attributes, then determines the interrelationships and interaction among the classes. The last step is (74) , which determines the actions performed by or to each class or subclass and presents this information in the form of (75) .

斐波那契(Fibonacci)数列可以递归地定义为：

用递归算法求解F(6)时需要执行 (61) 次“+”运算，该方法采用的算法策略是 (62) 。

Object-oriented analysis (OOA) is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is (71) . It determines how the various results are computed by the product and presents this information in the form of a (72) and associated scenarios. The second is (73) , which determines the classes and their attributes, then determines the interrelationships and interaction among the classes. The last step is (74) , which determines the actions performed by or to each class or subclass and presents this information in the form of (75) .

Object-oriented analysis (OOA) is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is (71) . It determines how the various results are computed by the product and presents this information in the form of a (72) and associated scenarios. The second is (73) , which determines the classes and their attributes, then determines the interrelationships and interaction among the classes. The last step is (74) , which determines the actions performed by or to each class or subclass and presents this information in the form of (75) .

在一个单CPU的计算机系统中，有3台不同的外部设备R1、R2和R3，以及3个进程P1、P2和P3。系统CPU调度采用可剥夺式优先级的进程调度方案，3个进程的优先级、使用设备的先后顺序和占用设备时间如表3-2所示。
表3-2 进程的优先级、使用设备的先后顺序和占用设备时间表

假设操作系统的开销忽略不计，从3个进程同时投入运行到全部完成，CPU的利用率约为 (23) %； R3的利用率约为 (24) %。其中，设备的利用率是指该设备的使用时间与进程组全部完成所占用时间的比率。

在一个单CPU的计算机系统中，有3台不同的外部设备R1、R2和R3，以及3个进程P1、P2和P3。系统CPU调度采用可剥夺式优先级的进程调度方案，3个进程的优先级、使用设备的先后顺序和占用设备时间如表3-2所示。
表3-2 进程的优先级、使用设备的先后顺序和占用设备时间表

假设操作系统的开销忽略不计，从3个进程同时投入运行到全部完成，CPU的利用率约为 (23) %； R3的利用率约为 (24) %。其中，设备的利用率是指该设备的使用时间与进程组全部完成所占用时间的比率。