试题1

在数据库管理系统中， （  ） 不属于安全性控制机制。
A、完整性约束
B、视图
C、密码验证
D、用户授权

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试题2

可用于数字签名的算法是（） 。
A．RSA
B．IDEA
C．RC4
D．MD5

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试题3

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试题4

why have formal documents 
first, writing the decisions down is essential.Only when one writes do the gaps appear and the    (1)    protrude(突出).The act of writing turns out to require hundreds of mini-decisions.and it is the existence of these that distinguishes clear.exact policies from fuzzy ones.
Second.the documents will communicate the decisions to others. The manager will be continually amazed that poliaes he took for common knowledge are totally unknown by some member of his team . Since his fundamentaljob is to keep everybody going in the  (2)directon. his chief daily task will be communication, not decision-making,and his documents will immensely   (3)   this load.
Finally.a manager,s documents give him a data base and checklist. By reviewing them (4)he sees where he is. and he sees what changes of emphasis or shifts in direction are needed.
The task of the manager is to develop a plan and then to realize it. But only the written plan is precise and communicable. Such a plan consists of documents on what.when. how much.where.and who.This small set of critical documents  (5)  much of the manager.s   work.if their comprehensive and critical nature is recognized in the beginning. the manager can approach them as friendly tools rather than annoying busywork. He will set his direction much more crisply and quickly by doing so.
（1）A.inconsistencies
B.consistencies
C.steadiness
D.adaptability
（2）A.other
B.different
C.another
D.same
（3）A.extend
B.broaden
C.lighten
D.release
（4）A.periodically
B.occasionally
C.infrequently
D.rarely
（5）A.decides
B.encapsulates
C.realizes
D.recognizes

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试题5

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试题6

电视系统采用的颜色空间中，其亮度信号和色度信号是相分离的。下列颜色空间中,（ ）颜色空间不属于电视系统的颜色空间。
A、YUV
B、YIQ
C、YcbCr
D、HSL

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试题7

集合 （  ）。
A、可用正规式“ ”表示
B、不能用正规式表示，但可用非确定的有限自动机识别
C、可用正规式“ ”表示
D、不能用正规式表示，但可用上下文无关文法表示

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试题8

在面向对象方法中，（1）是父类和子类之间共享数据和方法的机制。子类在原有父类接口的基础上，用适合于自己要求的实现去置换父类中的相应实现称为（2）。
（1）A．封装
B．继承
C．覆盖
D．多态
（2）A．封装
B．继承
C．覆盖
D．多态

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试题9

输入受限的双端队列是指元素只能从队列的一端输入，但可以从队列的两端输出，如下图所示。若有8、1、4、2依次进入输入受限的双端队列，则得不到输出序列 （ ） 。
A、2、8、1、4
B、1、4、8、2
C、4、2、1、8
D、2、1、4、8

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试题10

面向对象开发方法的基本思想是尽可能按照人类认识客观世界的方法来分析和解决问 题，（ ）方法不属于面向对象方法。
A、Booch
B、Coad
C、OMT
D、Jackson

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