试题1

某网站向 CA 申请了数字证书，用户通过（ ）来验证网站的真伪
A、CA 的签名
B、证书中的公钥
C、网站的私钥
D、用户的公钥

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试题2

there is nothing in this world constant but inconstancy.-SWIFT
Project after project designs a set of algorithms and then plunges intoconstruction of customer-deliverable software on a schedule that demands delivery of the first thing built.
In most projects, the first system built is (1) usable. It may be too slow, too big , awkward to use, or all three. There is no (2 ) but to start again, smarting but smarter and build a redesigned version in which these problems are solved. The discard and (3) may be done in one lump, or it may be done piece-by-piece. But all large-system experience shows that it will be done. Where a new system concept or new technology is used, one has to build a syste m to throw away, for even the best
planning is not so omniscient (全知的) as to get it fight the first time.
the management question, therefore, is not whether to build a pilot system and throw it away. You will do that. The only question is whether to plan in advance to build a (4).or to promise to deliver the throwaway to customers. Seen this way, the answer is much clearer. Delivering that throwaway to customers buys time, but it does so only at the (5) of agony (极大痛苦) for the user, distraction for the builders while they do the redesign, and a bad..reputation for the product that the best redesign will find hard to live down.
Henceplanto throw one away; you will,anyhow.
The management question, therefore, is not whether to build a pilot system and throw it away. You will do that. The only question is whether to plan in advance to build a throwaway, or to promise to deliver the throwaway to customers. Seen this way, the answer is much clearer. Delivering that throwaway to customers buys time, but it does so only at the cost of agony for the user, distraction for the builders while they do the redesign, and a bad reputation for the product that the best redesign will find hard to live down.
(1)A.almost
B.often
C.usually
D.barely
(2)A.alternative
B.need
C.possibility
D.solution
(3)A.design
B.redesign
C.plan
D.build
(4) A.throwaway
B.system
C.software
D.product
(5) A.worth
B. value
C. cost
D. invaluable

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试题3

随着网站知名度不断提高，网站访问量逐渐上升，网站负荷越来越重，针对此问题，一方面可通过升级网站服务器的软硬件，另一方面可以通过集群技术，如DNS负载均衡来解决。在Windows的DNS服务器中通过（）操作可以确保域名解析并实现负载均衡。
A．启用循环，启动转发器指向每个Web服务器
B．禁止循环，启动转发器指向每个Web服务器
C．禁止循环，添加每个Web服务器的主机记录
D．启用循环，添加每个Web服务器的主机记录

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试题4

UML中关联是一个结构关系，描述了一组链。两个类之间（40）关联。
A．不能有多个
B．可以有多个由不同角色标识的
C．可以有任意多个
D．的多个关联必须聚合成一个

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试题5

A. A
B. B
C. C
D. D

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试题6

给定关系模式R(U,F)，U={A,B,C,D,E,H}，函数依赖集F={A→B,A→C,C→D,AE→H}。关系模式R的候选关键字为（）。
A．AC
B．AB
C．AE
D．DE

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试题7

若采用邻接矩阵来存储简单有向图，则其某一个顶点i的入度等于该矩阵（ ）。
A、第i行中值为1的元素个数 
B、所有值为1的元素总数 
C、第i行及第i列中值为1的元素总个数 
D、第i列中值为1的元素个数 

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试题8

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试题9

某程序根据输入的三条线段长度，判断这三条线段能否构成三角形。以下试用例中，  （ ）  两个用例属于同一个等价类。
①6、7、13；        ②4、7、10；        ③9、20、35；
④9、11、21；        ⑤5、5、4；        ⑥4、4、4。
A、①②
B、③④
C、⑤⑥
D、①④

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试题10

Cache 用于存放主存数据的部分拷贝，主存单元地址与 Cache 单元地址之间的转换工作由  （ ）  完成。
A、硬件
B、软件
C、用户
D、程序员

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