java语言程序设计（19秋）形考作业2

adminhan

<p><span style="font-size:14px;font-family:宋体">▁▁对象一般是Java系统中的严重问题。</span></p>
A:<p>Error<br></p>
B:<p>Exception<br></p>
C:<p>Throwable<br></p>
D:<p>任何<br></p>

<p><span style="font-size:14px;font-family:宋体">▁▁对象管理基于流的连接。</span></p>
A:<p><span style="font-size:13px;font-family: 宋体">ServeSocker</span></p>
B:<p><span style="font-size:13px;font-family: 宋体">Socket</span></p>
C:<p><span style="font-size:13px;font-family: 宋体">Vector</span></p>
D:<p><span style="font-size:13px;font-family: 宋体">DatagramSocket</span></p>

<p><span style="font-size:14px;font-family:宋体">FilterOutputStream类继承下面哪个类？</span></p>
A:<p>File<br></p>
B:<p>InputStream<br></p>
C:<p>OutputStream<br></p>
D:<p>FileOutputStream<br></p>

<p><span style="font-size:14px;font-family:宋体">URL构成函数将决定作为参数的字符串是否是合法的统一资源定位器。如果合法，则初始化包含统一资源定位器的URL对象，否则将产生▁▁。</span></p>
A:<p><span style="font-size:13px;font-family: 宋体">IOException</span></p>
B:<p><span style="font-size:13px;font-family: 宋体">UnknownHostException</span></p>
C:<p><span style="font-size:13px;font-family: 宋体">SocketException</span></p>
D:<p><span style="font-size:13px;font-family: 宋体">MalformedURLExceptin</span></p>

<p><span style="font-size:14px;font-family:宋体">执行条件运算符语句</span><span style="font-size:14px;font-family:'Times New Roman','serif'">&nbsp;Float f1 = false? 1.0f: null;</span><span style="font-size:14px;font-family: 宋体">，变量</span><span style="font-size:14px;font-family:'Times New Roman','serif'">f2</span><span style="font-size:14px;font-family:宋体">的值应该是</span><span style="font-size: 14px; font-family: 宋体; text-decoration: underline;"> &nbsp; </span><span style="font-size:14px;font-family:宋体">。</span></p>
A:<p>1.0<br></p>
B:<p>0.0<br></p>
C:<p>1<br></p>
D:<p>null<br></p>

<p><span style="font-size: 14px; font-family: 宋体; color: rgb(0, 0, 0);">如果超类不允许其通过继承的方式产生的子类访问它的某些成员，那么它必须以什么方</span><span style="font-size:14px;font-family:宋体">式声明该成员。</span></p>
A:<p>public<br></p>
B:<p>private<br></p>
C:<p>protected<br></p>
D:<p>static<br></p>

<p>互联网上首个能够执行内嵌程序的浏览器是<span style="text-decoration: underline;"> &nbsp; &nbsp;</span>。<br></p>
A:<p>HotJava<br></p>
B:<p>IE<br></p>
C:<p>Netscape<br></p>
D:<p>FireFox<br></p>

<p><span style="font-size:16px;font-family:宋体">当处理的数据量很多，或向文件些很多次小数据，一般使用</span><span style="font-size: 16px; font-family: 宋体; text-decoration: underline;"> &nbsp; &nbsp; </span><span style="font-size:16px;font-family:宋体">流。</span></p>
A:<p><span style="font-size:16px;font-family: 宋体;color:#000066">DataOutput</span></p>
B:<p><span style="font-size:16px;font-family: 宋体">FileOutput</span></p>
C:<p><span style="font-size:16px;font-family: 宋体">BufferedOutput</span></p>
D:<p><span style="font-size:16px;font-family: 宋体">PipedOutput</span></p>

<p><span style="font-size: 14px; font-family: 宋体; color: rgb(0, 0, 0);">OOP将什么封装进一个类？</span></p>
A:<p>数据<br></p>
B:<p>数据和属性<br></p>
C:<p>方法和行为<br></p>
D:<p>数据和方法<br></p>

<p style="margin-left:28px"><span style="font-size:14px;font-family:宋体">一个</span><span style="font-size:14px;font-family:'Times New Roman','serif'">Java</span><span style="font-size:14px;font-family:宋体">源文件中最多可以</span><span style="text-decoration:underline;"><span style="font-size:14px;font-family:'Times New Roman','serif'">&nbsp;&nbsp;&nbsp; &nbsp;</span></span><span style="font-size:14px;font-family:宋体">个</span><span style="font-size:14px;font-family:'Times New Roman','serif'">public</span><span style="font-size:14px;font-family:宋体">类。</span></p><p><br></p>
A:<p>0<br></p>
B:<p>1<br></p>
C:<p>2<br></p>
D:<p>无限<br></p>

<p><span style="font-size:14px;font-family:宋体">在对象序列化中，如何实现对象属性的部分存取？</span></p>
A:<p><span style="font-size:14px;font-family:宋体">使用</span><span style="font-size:14px;font-family:'Times New Roman','serif'">transient</span><span style="font-size:14px;font-family:宋体">关键字修饰对象属性</span></p>
B:<p><span style="font-size:14px;font-family:宋体">使用</span><span style="font-size:14px;font-family:'Times New Roman','serif'">synchronized</span><span style="font-size:14px;font-family:宋体">关键字修饰</span><span style="font-size: 14px;font-family:'Times New Roman','serif'">readObject</span><span style="font-size:14px;font-family:宋体">（）方法</span></p>
C:<p><span style="font-size:14px;font-family:宋体">通过自定义对象序列化途径完成</span></p>
D:<p><span style="font-size:14px;font-family:宋体">使用</span><span style="font-size:14px;font-family:'Times New Roman','serif'">synchronized</span><span style="font-size:14px;font-family:宋体">关键字修饰</span><span style="font-size: 14px;font-family:'Times New Roman','serif'">writeObject</span><span style="font-size:14px;font-family:宋体">（）方法</span></p>

<p><span style="font-size:14px;font-family:宋体">Java自定义异常类可以继承<span style="text-decoration:underline;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>类。</span></p>
A:<p>Throwable</p>
B:<p>Error<br></p>
C:<p>Exception<br></p>
D:<p>RuntimeException<br></p>

<p style="margin-top: 0px; margin-bottom: 0px; margin-left: 28px; padding: 0px; font-family: 'Microsoft YaHei', 宋体; font-size: 14px; color: rgb(51, 51, 51); outline: none; text-indent: 0em; white-space: normal; background-color: rgb(255, 255, 255);"><span style="margin: 0px; padding: 0px; font-family: 宋体;">请看下面的代码</span></p><p style="margin-top: 0px; margin-bottom: 0px; margin-left: 28px; padding: 0px; font-family: 'Microsoft YaHei', 宋体; font-size: 14px; color: rgb(51, 51, 51); outline: none; text-indent: 0em; white-space: normal; background-color: rgb(255, 255, 255);"><span style="margin: 0px; padding: 0px; text-indent: 25px; font-family: 宋体;">1.StringBuffer sb = new StringBuffer(</span><span style="margin: 0px; padding: 0px; text-indent: 25px;">“</span><span style="margin: 0px; padding: 0px; text-indent: 25px; font-family: 宋体;">abc</span><span style="margin: 0px; padding: 0px; text-indent: 25px;">”</span><span style="margin: 0px; padding: 0px; text-indent: 25px; font-family: 宋体;">);</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 'Microsoft YaHei', 宋体; font-size: 14px; color: rgb(51, 51, 51); outline: none; white-space: normal; text-indent: 25px; background-color: rgb(255, 255, 255);"><span style="margin: 0px; padding: 0px; font-family: 宋体;">2.String s = new String(</span>“<span style="margin: 0px; padding: 0px; font-family: 宋体;">abc</span>”<span style="margin: 0px; padding: 0px; font-family: 宋体;">);</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 'Microsoft YaHei', 宋体; font-size: 14px; color: rgb(51, 51, 51); outline: none; white-space: normal; text-indent: 25px; background-color: rgb(255, 255, 255);"><span style="margin: 0px; padding: 0px; font-family: 宋体;">3.sb.append(</span>“<span style="margin: 0px; padding: 0px; font-family: 宋体;">def</span>”<span style="margin: 0px; padding: 0px; font-family: 宋体;">);</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 'Microsoft YaHei', 宋体; font-size: 14px; color: rgb(51, 51, 51); outline: none; white-space: normal; text-indent: 25px; background-color: rgb(255, 255, 255);"><span style="margin: 0px; padding: 0px; font-family: 宋体;">4.s.append(</span>“<span style="margin: 0px; padding: 0px; font-family: 宋体;">def</span>”<span style="margin: 0px; padding: 0px; font-family: 宋体;">);</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 'Microsoft YaHei', 宋体; font-size: 14px; color: rgb(51, 51, 51); outline: none; white-space: normal; text-indent: 25px; background-color: rgb(255, 255, 255);"><span style="margin: 0px; padding: 0px; font-family: 宋体;">5.sb.insert(1,</span>”<span style="margin: 0px; padding: 0px; font-family: 宋体;">zzzz</span>”<span style="margin: 0px; padding: 0px; font-family: 宋体;">);</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 'Microsoft YaHei', 宋体; font-size: 14px; color: rgb(51, 51, 51); outline: none; white-space: normal; text-indent: 25px; background-color: rgb(255, 255, 255);"><span style="margin: 0px; padding: 0px; font-family: 宋体;">6.s.concat(sb);</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 'Microsoft YaHei', 宋体; font-size: 14px; color: rgb(51, 51, 51); outline: none; white-space: normal; text-indent: 25px; background-color: rgb(255, 255, 255);"><span style="margin: 0px; padding: 0px; font-family: 宋体;">7.s.trim( );</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: 'Microsoft YaHei', 宋体; font-size: 14px; color: rgb(51, 51, 51); outline: none; white-space: normal; text-indent: 25px; background-color: rgb(255, 255, 255);"><span style="margin: 0px; padding: 0px; font-family: 宋体;">下面说法正确的是</span></p><p><br></p>
A:<p><span style="font-size:14px;font-family:宋体">编译时在第1行发生一个错误</span></p>
B:<p><span style="font-size: 14px; font-family: 宋体;">编译时在第2行发生一个错误</span></p>
C:<p><span style="font-size: 14px; font-family: 宋体;">编译时在第3行发生一个错误</span></p>
D:<p><span style="font-size: 14px; font-family: 宋体;">编译时在第4行发生一个错误</span></p>
E:<p><span style="font-size: 14px; font-family: 宋体;">编译时在第5行发生一个错误</span></p>
F:<p><span style="font-size: 14px; font-family: 宋体;">编译时在第6行发生一个错误</span></p>
G:<p><span style="font-size: 14px; font-family: 宋体;">编译时在第7行发生一个错误</span></p>

<p>下面标识符中，哪些是错误的？<br></p>
A:<p>MyGeme<br></p>
B:<p>this<br></p>
C:<p>1_test<br></p>
D:<p>$abc</p>
E:<p>aaa<br></p>

<p><span style="font-size:14px;font-family:宋体">下列关于线程的说法，正确的是<span style="text-decoration:underline;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>。</span></p>
A:<p><span style="font-size:14px;font-family:宋体">线程有执行入口和出口</span></p>
B:<p><span style="font-size:14px;font-family:宋体">线程可以独立运行</span></p>
C:<p><span style="font-size:14px;font-family:宋体">线程是程序内部的一个顺序控制流</span></p>
D:<p><span style="font-size:14px;font-family:宋体">多线程程序的在相同输入条件下的执行结果可能不相同</span></p>

<p><span style="font-size:14px;font-family:宋体">构成World Wide Web基础的关键协议是TCP/IP。</span></p>
A:正确
B:<p>错误</p>

<p><span style="font-size:14px;font-family:宋体">Java容器组件只支持JDK提供的5种布局方式。</span></p>
A:正确
B:错误

<p><span style="font-size:14px;font-family:宋体">进程利用流socket建立与其他进程的连接。</span></p>
A:正确
B:错误

<p><span style="font-size:14px;font-family:宋体">零布局管理就是指使用系统默认的布局管理，无需用户自行指定。</span></p>
A:正确
B:错误

<p><span style="font-size:14px;font-family:宋体">如果在try块之后没有catch块，则必须有finally块。</span></p>
A:正确
B:错误