2017年5 A Level 计算机样题分析

2022-05-16 00:16:14   文档大全网     [ 字体: ] [ 阅读: ]

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计算机,分析,Level,2017
20175/6A Level 计算机试题解读

剑桥 ALevel可以理解为是英国以及英联邦国家高中毕业的会考考试,其成绩可以作为被大学录取的学业能力证明文件。这也是国内很多剑桥A Level 课程或学校给学生提供的课程。



本文主要目的是解读2017A Level 计算机考试的题目,感兴趣的朋友可以继续了解。本文也希望能帮助正在准备A Level 计算机的考生。

考试时间:1小时30分钟 考试形式:笔试

Paper 1 Theory Fundamentals 试卷一理论基础

考试要求:考生直接在试卷作答;不得使用其他材料;不得使用计算器。

Read These Instructions First

考试指南,blablabla … 此处省略。 考试分数75

考试难度难度如何呢?我们一起来看看。



1 Ahospitalisdividedintotwoareas,AreaAandAreaB.Eachareahasseveralwards.A

lltheward names aredifferent.



A number of nurses are based in Area A. These nurses always work on the same ward. Each nurse has a unique Nurse ID of STRINGdata type.

A-NURSE

A-WARD



(a) Describe the relationship shownabove.



...................................................................................................................................................



...............................................................................................................................................[1]



(b) A relational database is created to store the ward and nurse data. The

two table designs for Area Aare:



A-WARD(WardName, NumberOfBeds)



A-NURSE(NurseID, FirstName,

1




FamilyName, ...........................................................)



()i

Complete the design for theA-NURSEtable.

Explain how the relationship in part (a) isimplemented.

..............................................................................................................

.............................

[1]



()i



..............................................................................................................

.............................



...........................................................................................................................................



.......................................................................................................................................[2]



(c) In Area B of the hospital, there are a number of wards and a number

ofnurses.



Each Area B ward has a specialism. Each Area B nurse has a specialism.

AnursecanbeaskedtoworkinanyoftheAreaBwardswheretheirspecialismmatcheswith the wardspecialism.



The relationship for Area B of the hospital is:

B-NURSE

B-WARD



()i

Explain what the degree of relationship is between the entities B-NURSEand B-WARD.

..............................................................................................................

.............................



..............................................................................................................

2




.........................[1]



如果这一道关于关系型数据库的题目,你感觉吃力的化,那么你还需要一段时间的准备和练习,因为考试时间的原因,你必须熟练作答。

比如1(a) 问题是考察你是否看的懂 ERD图,如果你在学习过程中知道crow’s foot notation , 一种在数据库模型设计过程中使用的标记方式。

那么这道题你很清楚,Many-to-one 的关系。可以轻松作答。

其他问题都是SQL的基本命令,如果你在学习中做过visio内的练习,这些都会非常简单。

我正在整理A Level 计算机的所有内容,如果感兴趣,可以和我保持联系。谢谢。。

以上题目的答案:



1bA-NURSE(NurseID, FirstName, FamilyName, WardName)

1(b)ii The primary key WardName in the A-WARD table links to the foreign key WardName in the A-NURSE table.

1(c) Many-to-many relationship

3




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