试题1

Observe that for the programmer, as for the chef, the urgency of the patron（顾客）
may govern the scheduled completion of the task, but it cannot govern the actual completion.
An omelette（煎鸡蛋）, promised in two minutes, may appear to be progressing nicely. But
when  it  has  not  set  in  two  minutes,  the  customer  has  two  choices—waits  or  eats  it  raw. Software customers have had  （1）  choices.Now I do not think software  （2）  have less inherent courage and firmness than chefs, nor than other engineering managers. But false  （3）  to match the patron's desired date is much more common in our discipline than elsewhere in engineering. It is very  （4）to make a vigorous, plausible, and job risking defense of an estimate that is derived by no quantitative method, supported by little data, and certified chiefly by the hunches of the managers.Clearly two solutions are needed. We need to develop and publicize productivity figures, bug-incidence figures, estimating rules, and so on. The whole profession can only profit from  （5）  such data. Until estimating is on a sounder basis, individual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates.
（1）A、no
B、the same
C、other
D、lots of
（2）A、testers
B、constructors
C、managers
D、architects
（3）A、tasks
B、jobs
C、works
D、scheduling
（4）A、easy
B、difficult
C、simple
D、painless
（5）A、sharing
B、excluding
C、omitting
D、ignoring

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试题2

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试题3

若有关系R(A，B，C，D）和S(C，D，E），则与表达式π_3,4,7(σ_4＜5(R×S))等价的SQL语句如下：

SELECT （1） FROM （2）WHERE（3） ;

（1）A．A,B,C,D,E

B．C,D,E

C．R.A,R.B,R.C, R.D, S.E

D．R.C,R.D,S.E

（2）A．R

B．S

C．R，S

D．RS

（3）A．D＜C

B．R.DD＜CS.C

C．R.DD＜CR.C

D．S.DD＜CR.C

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试题4

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试题5

下图所示的PCB（进程控制块）的组织方式是（），图中（）。

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试题6

WebSQL is a SQL-like （1） language for extracting information from the web. Its capabilities for performing navigation of web （2） make it a useful tool for automating several web-related tasks that require the systematic processing of either all the links in a （3） , all the pages that can be reached from a given URL through （4） that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common （5） Interface.
（1）A、query  
B、transaction  
C、communication  
D、programming
（2）A、browsers  
B、servers 
C、hypertexts  
D、clients
（3）A、hypertext  
B、page 
C、protocol  
D、operation
（4）A、paths 
B、chips  
C、tools  
D、directories
（5）A、Router  
B、Device 
C、Computer  
D、Gateway

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试题7

在计算机系统中，构成虚拟存储器（ ）。
A、只需要一定的硬件资源便可实现
B、只需要一定的软件即可实现
C、既需要软件也需要硬件方可实现
D、既不需要软件也不需要硬件

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试题8

集合A={d．b．c}上的二元关系R为：R={<a,a>,<c,c>,<a,b>)}，则二元关系R是（ ）。
A、自反的 
B、反自反的 
C、对称的 
D、传递的 

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试题9

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试题10

某软件项目的活动图如下图所示,其中顶点表示项目里程碑,连接顶点的边表示包含的活动,边上的数字表示活动的持续天数,则完成该项目的最少时间为(18)天。活动EH和IJ的松弛时间分别为(19)天。

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