题目内容

以下关于等价类划分法的叙述中,不正确的是___________。

A. 如果规定输入值string1必须以’\0’结束,那么得到两个等价类,即有效等价类{string1|string1以’\0’结束),无效等价类{string1|string1不以’\0’结束}
B. 如果规定输入值int1取值为1,-1两个数之一,那么得到3个等价类,即有效等价类{int1|int1=1)、{int1|int1=-1),无效等价类{int1|int1≠1并且int1≠-1}
C. 如果规定输入值int2的取值范围为-10~9,那么得到两个等价类,即有效等价类{int2|-10<=int2<=9),无效等价类{int2|int2<-10或者int2>9)
D. 如果规定输入值int3为质数,那么得到两个等价类,即有效等价类{int3|int3是质数},无效等价类{int3|int3不是质数}

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以下关于极限编程XP的叙述中,不正确的是___________。

A. 由价值观、原则、实践和行为四个部分组成
B. 每一个不同的项目都需要一套不同的策略、约定和方法论
C. 有四个价值观,即沟通、简单性、反馈和勇气
D. 有五大原则,即快速反馈、简单性假设、逐步修改、提倡更改和优质工作

__________不属于主动攻击。

A. 流量分析
B. 重放
C. IP地址欺骗
D. 拒绝服务

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. (74)

A. statics
B. nature
C. dynamics
D. originals

颜色深度是表达图像中单个像素的颜色或灰度所占的位数(bit)。若每个像素具有8位的颜色深度,则可表示__________种不同的颜色。

A. 8
B. 64
C. 256
D. 512

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