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标题: 跟crakman做sas base认证试题（29） [打印本页]

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作者: shiyiming    时间: 2010-11-12 00:19
标题: 跟crakman做sas base认证试题（29）
From crackman's blog on Baidu


               
                <p><font size="4">29.The following SAS program is sumbitted:<br>
<br>
  data WORK.INFO;<br>
&nbsp;&nbsp;&nbsp;&nbsp;  infile 'DATAFILE.TXT';<br>
&nbsp;&nbsp;&nbsp;&nbsp;  input @1 Company $20. @25 State $2. @;<br>
&nbsp;&nbsp;&nbsp;&nbsp;  if State=' ' then input @30 Year;<br>
&nbsp;&nbsp;&nbsp;&nbsp;  else input @30 City Year; <br>
&nbsp;&nbsp;&nbsp;&nbsp;  input NumEmployees;<br>
  run;<br>
<br>
How many raw data records are read during each iteration of the DATA step?</font></p>
<p><font size="4">&nbsp;&nbsp;&nbsp;&nbsp;  A. 1 <br>
&nbsp;&nbsp;&nbsp;&nbsp;  B. 2 <br>
&nbsp;&nbsp;&nbsp;&nbsp;  C. 3 <br>
&nbsp;&nbsp;&nbsp;&nbsp;  D. 4 </font></p>
<p><font size="4">Answer: A  </font></p>
<p><font size="4">这里考察的是@的使用，具体可以参考文章：<br>
跟crakman做sas base认证试题（2） </font><a href="http://hi.baidu.com/crack_man/blog/item/a9f21491136540187af48043.html"><font size="4"><!-- m --><a class="postlink" href="http://hi.baidu.com/crack_man/blog/item/a9f21491136540187af48043.html">http://hi.baidu.com/crack_man/blog/item ... 48043.html</a><!-- m --></font></a><br>
<font size="4">INPUT语句中 @1 @25表示是列项，指针移到第1列读取数据，然后移到第25列，继续读数据。</font></p> <a href="http://hi.baidu.com/crack%5Fman/blog/item/12cdbf0472eb7497e850cd45.html">阅读全文</a>
               
                <br/><b>类别：</b><a href="http://hi.baidu.com/crack%5Fman/blog/category/%B8%FAcrackman%D7%F6sas%20base%C8%CF%D6%A4%CA%D4%CC%E2">跟crackman做sas base认证试题</a>&nbsp;<a href="http://hi.baidu.com/crack%5Fman/blog/item/12cdbf0472eb7497e850cd45.html#comment">查看评论</a>

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