SSD1模拟试卷

一. 单项选择题1. The term Web server refers to a(a) person who collects and manipulates Web pages(b) program that provides information requested by a Web client(c) special computer used to run powerful Web browsers(d) Web browser used on a client computer2. Which of the following is true about the accuracy of information on the Web?(a) Information on the Web might not be accurate.(b) Web organizations ensure that information on the Web is accurate.(c) Web server programs ensure that information on the Web is accurate.(d) Web administrators ensure that information on the Web is accurate.3. The <PRE> tag is used to(a) prefix every line of the enclosed text with its line number(b) instruct the browser to ignore line feeds in the enclosed text(c) instruct the browser to ignore the space in the enclosed text(d) enclose preformatted text4. Which of the following HTML hyperlinks references a section of the same page in which the hyperlink appears?(a) <a href="#bottom">Scroll down</a>(b) <a href="/bottom">Scroll down</a>(c) <a href="bottom">Scroll down</a>(d) <a href=":bottom">Scroll down</a>5. What is the conceptual difference between logical and physical styles?(a) Logical styles are intended to specify the look of content, whereas physical styles are usedto specify the meaning of content.(b) Logical styles are intended to be used for text, whereas physical styles are intended to beused for graphics.(c) Logical styles are intended to be used for graphics, whereas physical styles are intended tobe used for text.(d) Logical styles are intended to specify the meaning of content, whereas physical styles areused to specify the look of content.6. The series of interactions a user has with a Web server to carry out a task is known as a(a) request(b) response(c) transaction(d) session7. In Java programming, a programmer creates _____ files, and then a compiler translates them to_____ files.(a) HTML, byte code(b) source, HTML(c) source, byte code(d) byte code, source8. Upon compilation, the source code of a Java class MyClass will be stored in the file _____, andthe corresponding byte code will be stored in the file _____.(a) MyClass.class, MyClass.exe(b) MyClass.java, MyClass.exe(c) MyClass.class, MyClass.java(d) MyClass.java, MyClass.class9. What is the name of the class whose definition is begun by the following line?public class Hello extends Greeting(a) Greeting(b) Greeting.Hello(c) Hello.Greeting(d) Hello10. In Java, a method with the same name as its class is known as a(a) constructor(b) synonym(c) default behavior(d) clone11. Which of the following Java statements correctly declares and instantiates a V ector v?(a) V ector v = new V ector(v); (b) V ector v = new V ector();(c) V ector v = V ector(); (d) v = new V ector();12. Which of the following kinds of relationships between classes does inheritance describe?(a) uses-a(b) is-a-kind-of(c) has-a(d) produces-a13. In the class defined belowclass MyClass {int age = 19;void myMethod() {int counter;}}(a) age is an instance variable and counter is a local variable(b) age is a local variable and counter is an instance variable(c) both age and counter are instance variables(d) both age and counter are local variables二. 简答题.1.What is the World Wide Web?2.URL的全称是什么? URL的定义是什么?3. Please describe the four phases in the process of Programming.4. 什么是类?什么是对象?什么是消息?5. 请说明面向对象中类与类之间有几种关系?并举例说明.三. 编程题1. 分析下面的代码,写出运行结果.(1)public class X{public static void main(String[] args){String strHello = “Hello,”;String strHi = “Hi,”;Modify(s);System.out.println(s);}public static void modify (string s) {s += ”Welcome to CSU!”;}}(2)int i = 1, sum = 0;while (i < 3){int j = 0;while ( j < 2){sum = sum + j;j = j + 1;}i = i + 1;}System.out.println（“count after loop = ” + count）;2. 编写Java代码, 完成以下功能.假定goals和errors都是类型为int的变量。

编写一个if-else语句，要求在goals小于10且errors为0的条件下输出“Wow”，否则输出“Oh Well”。

四. 设计题在一个学校教职工管理系统中，需要对学校教职工(staff)进行建模。

教职工信息包括教职工编号、姓名、年龄。

教职工可以分为职工（worker）和教师（teacher）。

教师根据工作性质可以分为授课教师和科研教师。

教职工入职时都要办理入职手续，职工根据自己的工种来工作（work），授课教师根据自己所学专业来授课（teaching），科研教师根据自己的研究方向来开展科研工作（reseach）。

1．请根据以上描述设计出类图，以显式表示出继承关系。

类图中包括类名、主要的属性和主要的方法。

2．试用程序实现教职工类和职工类。

（方法的实现，可以利用打印语句来简单模拟实现。

如：System.out.println(“work!”).）3．思考：如果在这个系统中，需要建立学校（school）这个类，那么学校和教职工这两个类之间是什么关系？。