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2017年5/6月A 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2017年A 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:
1(b)A-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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