71道经典Android面试题和答案--重要知识点都涉及到了

面试题
1.<wbr><wbr><wbr><wbr><wbr><wbr>下列哪些语句关于内存回收的说明是正确的? (b )</wbr></wbr></wbr></wbr></wbr></wbr><wbr>A、 程序员必须创建一个线程来释放内存<br><wbr><wbr>B、内存回收程序负责释放无用内存<wbr><br><wbr><wbr>C、内存回收程序允许程序员直接释放内存<wbr><br><wbr><wbr>D、内存回收程序可以在指定的时间释放内存对象<wbr><br><strong>2.<wbr><wbr><wbr><wbr><wbr><wbr>下面异常是属于Runtime Exception 的是（abcd）(多选)</wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr><wbr><wbr>A、<span style="font-family:Arial"><span style="font-size:9pt">ArithmeticException</span><br><wbr><wbr><wbr><wbr>B、<span style="font-size:9pt">IllegalArgumentException<wbr></wbr></span><wbr><br><wbr><wbr><wbr><wbr>C、<span style="font-size:9pt">NullPointerException</span><wbr><br><wbr><wbr><wbr><wbr>D、<span style="font-size:9pt">BufferUnderflowException<wbr></wbr></span><wbr><br><strong>3.<wbr><wbr><wbr><wbr><wbr><wbr>Math.round(11.5)等于多少(). Math.round(-11.5)等于多少(c). c</wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr> A、11 ,-11<wbr><wbr>B、11 ,-12<wbr><wbr>C、12 ,-11<wbr><wbr>D、12 ,-12<br></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>4.<wbr><wbr><wbr><wbr><wbr><wbr>下列程序段的输出结果是：（b ）<br><wbr><wbr><wbr><wbr>void complicatedexpression_r(){<br><wbr><wbr><wbr><wbr>int x=20, y=30;<br><wbr><wbr><wbr><wbr>boolean b;<br><wbr><wbr><wbr><wbr>b=x&gt;50&amp;&amp;y&gt;60||x&gt;50&amp;&amp;y&lt;-60||x&lt;-50&amp;&amp;y&gt;60||x&lt;-50&amp;&amp;y&lt;-60;<br><wbr><wbr><wbr><wbr>System.out.println(b);<br><wbr><wbr><wbr><wbr>}<br><wbr><wbr><wbr><wbr>A、true<wbr><wbr>B、false<wbr><wbr>C、1<wbr><wbr>D、011.activity5.<wbr><wbr><wbr><wbr><wbr><wbr>对一些资源以及状态的操作保存，最好是保存在生命周期的哪个函数中进行(d)</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr><wbr><wbr>A、onPause()<wbr><wbr>B、onCreate()<wbr><wbr>C、 onResume()<wbr><wbr>D、onStart()<br><strong>6.<wbr><wbr><wbr><wbr><wbr><wbr>Intent传递数据时，下列的数据类型哪些可以被传递（abcd）(多选)</wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr><wbr><wbr> A、Serializable<wbr><wbr>B、charsequence<wbr><wbr>C、Parcelable<wbr><wbr>D、Bundle<br><strong>7.<wbr><wbr><wbr><wbr><wbr><wbr><a href="http://www.apkbus.com/" target="_blank"><span style="color:#336699">android</span></a><wbr>中下列属于Intent的作用的是(c)</wbr></wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr>A、实现应用程序间的数据共享<br><wbr><wbr>B、是一段长的生命周期，没有用户界面的程序，可以保持应用在后台运行，而不会因为切换页面而消失<br><wbr><wbr>C、可以实现界面间的切换，可以包含动作和动作数据，连接四大组件的纽带<br><wbr><wbr>D、处理一个应用程序整体性的工作<br><strong>8.<wbr><wbr><wbr><wbr><wbr><wbr>下列属于SAX解析xml文件的优点的是(b)</wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr><wbr><wbr>A、将整个文档树在内存中，便于操作，支持删除，修改，重新排列等多种功能<br><wbr><wbr><wbr><wbr>B、不用事先调入整个文档，占用资源少<br><wbr><wbr><wbr><wbr>C、整个文档调入内存，浪费时间和空间<br><wbr><wbr><wbr><wbr>D、不是长久驻留在内存，数据不是持久的，事件过后，若没有保存数据，数据就会<br><wbr><wbr>消失<br><strong>9.<wbr><wbr><wbr><wbr><wbr><wbr>下面的对自定style的方式正确的是（a）</wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr> A、 &lt;resources&gt;<br><wbr><wbr><wbr><wbr> &lt;style name="myStyle"&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;itemname="android:layout_width"&gt;fill_parent&lt;/item&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;/style&gt;<br> &lt;/resources&gt;<br><wbr><wbr><wbr><wbr>B、 &lt;style name="myStyle"&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;itemname="android:layout_width"&gt;fill_parent&lt;/item&gt;<br><wbr><wbr>&lt;/style&gt;<br><wbr><wbr><wbr><wbr>C、 &lt;resources&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;itemname="android:layout_width"&gt;fill_parent&lt;/item&gt;<br><wbr><wbr>&lt;/resources&gt;<br><wbr><wbr><wbr><wbr>D、 &lt;resources&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;stylename="android:layout_width"&gt;fill_parent&lt;/style&gt;<br><wbr><wbr>&lt;/resources&gt;<br><strong>10.<wbr><wbr><wbr><wbr> 在android中使用Menu时可能需要重写的方法有（ac）。(多选)</wbr></wbr></wbr></wbr></strong><wbr><wbr><wbr><wbr>A、onCreateOptionsMenu()<br><wbr><wbr>B、onCreateMenu()<br><wbr><wbr>C、onOptionsItemSelected()<br><wbr><wbr>D、onItemSelected()<br><strong>11.<wbr><wbr><wbr><wbr>在SQL Server Management Studio 中运行下列T-SQL语句，其输出值（c）。</wbr></wbr></wbr></wbr></strong><wbr>SELECT @@IDENTITY<wbr><wbr><br><wbr><wbr><wbr><wbr>A、<wbr><wbr><wbr><wbr>可能为0.1<br><wbr><wbr><wbr><wbr>B、<wbr><wbr><wbr><wbr> 可能为3<br><wbr><wbr><wbr><wbr>C、<wbr><wbr><wbr><wbr>不可能为-100<br><wbr><wbr><wbr><wbr>D、<wbr><wbr><wbr><wbr>肯定为0<br><strong>12.<wbr><wbr><wbr><wbr>在SQL Server 2005中运行如下T-SQL语句，假定SALES表中有多行数据，执行查询之<wbr><wbr><wbr><wbr>后的结果是（d）。</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr>BEGIN TRANSACTION A<br><wbr><wbr><wbr><wbr> Update SALES Set qty=30 WHERE qty&lt;30<br><wbr><wbr><wbr><wbr><wbr><wbr>BEGIN TRANSACTION B<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>Update SALES Set qty=40 WHEREqty&lt;40<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>Update SALES Set qty=50 WHEREqty&lt;50<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>Update SALES Set qty=60 WHEREqty&lt;60<br><wbr><wbr><wbr><wbr><wbr><wbr>COMMIT　TRANSACTION B<br><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

面试题
1.<wbr><wbr><wbr><wbr><wbr><wbr>下列哪些语句关于内存回收的说明是正确的? (b )</wbr></wbr></wbr></wbr></wbr></wbr><wbr>A、 程序员必须创建一个线程来释放内存<br><wbr><wbr>B、内存回收程序负责释放无用内存<wbr><br><wbr><wbr>C、内存回收程序允许程序员直接释放内存<wbr><br><wbr><wbr>D、内存回收程序可以在指定的时间释放内存对象<wbr><br><strong>2.<wbr><wbr><wbr><wbr><wbr><wbr>下面异常是属于Runtime Exception 的是（abcd）(多选)</wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr><wbr><wbr>A、<span style="font-family:Arial"><span style="font-size:9pt">ArithmeticException</span><br><wbr><wbr><wbr><wbr>B、<span style="font-size:9pt">IllegalArgumentException<wbr></wbr></span><wbr><br><wbr><wbr><wbr><wbr>C、<span style="font-size:9pt">NullPointerException</span><wbr><br><wbr><wbr><wbr><wbr>D、<span style="font-size:9pt">BufferUnderflowException<wbr></wbr></span><wbr><br><strong>3.<wbr><wbr><wbr><wbr><wbr><wbr>Math.round(11.5)等于多少(). Math.round(-11.5)等于多少(c). c</wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr> A、11 ,-11<wbr><wbr>B、11 ,-12<wbr><wbr>C、12 ,-11<wbr><wbr>D、12 ,-12<br></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>4.<wbr><wbr><wbr><wbr><wbr><wbr>下列程序段的输出结果是：（b ）<br><wbr><wbr><wbr><wbr>void complicatedexpression_r(){<br><wbr><wbr><wbr><wbr>int x=20, y=30;<br><wbr><wbr><wbr><wbr>boolean b;<br><wbr><wbr><wbr><wbr>b=x&gt;50&amp;&amp;y&gt;60||x&gt;50&amp;&amp;y&lt;-60||x&lt;-50&amp;&amp;y&gt;60||x&lt;-50&amp;&amp;y&lt;-60;<br><wbr><wbr><wbr><wbr>System.out.println(b);<br><wbr><wbr><wbr><wbr>}<br><wbr><wbr><wbr><wbr>A、true<wbr><wbr>B、false<wbr><wbr>C、1<wbr><wbr>D、011.activity5.<wbr><wbr><wbr><wbr><wbr><wbr>对一些资源以及状态的操作保存，最好是保存在生命周期的哪个函数中进行(d)</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr><wbr><wbr>A、onPause()<wbr><wbr>B、onCreate()<wbr><wbr>C、 onResume()<wbr><wbr>D、onStart()<br><strong>6.<wbr><wbr><wbr><wbr><wbr><wbr>Intent传递数据时，下列的数据类型哪些可以被传递（abcd）(多选)</wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr><wbr><wbr> A、Serializable<wbr><wbr>B、charsequence<wbr><wbr>C、Parcelable<wbr><wbr>D、Bundle<br><strong>7.<wbr><wbr><wbr><wbr><wbr><wbr><a href="http://www.apkbus.com/" target="_blank"><span style="color:#336699">android</span></a><wbr>中下列属于Intent的作用的是(c)</wbr></wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr>A、实现应用程序间的数据共享<br><wbr><wbr>B、是一段长的生命周期，没有用户界面的程序，可以保持应用在后台运行，而不会因为切换页面而消失<br><wbr><wbr>C、可以实现界面间的切换，可以包含动作和动作数据，连接四大组件的纽带<br><wbr><wbr>D、处理一个应用程序整体性的工作<br><strong>8.<wbr><wbr><wbr><wbr><wbr><wbr>下列属于SAX解析xml文件的优点的是(b)</wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr><wbr><wbr>A、将整个文档树在内存中，便于操作，支持删除，修改，重新排列等多种功能<br><wbr><wbr><wbr><wbr>B、不用事先调入整个文档，占用资源少<br><wbr><wbr><wbr><wbr>C、整个文档调入内存，浪费时间和空间<br><wbr><wbr><wbr><wbr>D、不是长久驻留在内存，数据不是持久的，事件过后，若没有保存数据，数据就会<br><wbr><wbr>消失<br><strong>9.<wbr><wbr><wbr><wbr><wbr><wbr>下面的对自定style的方式正确的是（a）</wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr><wbr> A、 &lt;resources&gt;<br><wbr><wbr><wbr><wbr> &lt;style name="myStyle"&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;itemname="android:layout_width"&gt;fill_parent&lt;/item&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;/style&gt;<br> &lt;/resources&gt;<br><wbr><wbr><wbr><wbr>B、 &lt;style name="myStyle"&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;itemname="android:layout_width"&gt;fill_parent&lt;/item&gt;<br><wbr><wbr>&lt;/style&gt;<br><wbr><wbr><wbr><wbr>C、 &lt;resources&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;itemname="android:layout_width"&gt;fill_parent&lt;/item&gt;<br><wbr><wbr>&lt;/resources&gt;<br><wbr><wbr><wbr><wbr>D、 &lt;resources&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> &lt;stylename="android:layout_width"&gt;fill_parent&lt;/style&gt;<br><wbr><wbr>&lt;/resources&gt;<br><strong>10.<wbr><wbr><wbr><wbr> 在android中使用Menu时可能需要重写的方法有（ac）。(多选)</wbr></wbr></wbr></wbr></strong><wbr><wbr><wbr><wbr>A、onCreateOptionsMenu()<br><wbr><wbr>B、onCreateMenu()<br><wbr><wbr>C、onOptionsItemSelected()<br><wbr><wbr>D、onItemSelected()<br><strong>11.<wbr><wbr><wbr><wbr>在SQL Server Management Studio 中运行下列T-SQL语句，其输出值（c）。</wbr></wbr></wbr></wbr></strong><wbr>SELECT @@IDENTITY<wbr><wbr><br><wbr><wbr><wbr><wbr>A、<wbr><wbr><wbr><wbr>可能为0.1<br><wbr><wbr><wbr><wbr>B、<wbr><wbr><wbr><wbr> 可能为3<br><wbr><wbr><wbr><wbr>C、<wbr><wbr><wbr><wbr>不可能为-100<br><wbr><wbr><wbr><wbr>D、<wbr><wbr><wbr><wbr>肯定为0<br><strong>12.<wbr><wbr><wbr><wbr>在SQL Server 2005中运行如下T-SQL语句，假定SALES表中有多行数据，执行查询之<wbr><wbr><wbr><wbr>后的结果是（d）。</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></strong><wbr>BEGIN TRANSACTION A<br><wbr><wbr><wbr><wbr> Update SALES Set qty=30 WHERE qty&lt;30<br><wbr><wbr><wbr><wbr><wbr><wbr>BEGIN TRANSACTION B<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>Update SALES Set qty=40 WHEREqty&lt;40<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>Update SALES Set qty=50 WHEREqty&lt;50<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>Update SALES Set qty=60 WHEREqty&lt;60<br><wbr><wbr><wbr><wbr><wbr><wbr>COMMIT　TRANSACTION B<br><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>