Complete DTD and Document

  <?xml version="1.0"?>
  <!DOCTYPE exam [
    <!ELEMENT exam (student,(qapair)*) >
    <!ATTLIST exam course CDATA #REQUIRED>
    <!ELEMENT student (#PCDATA)>
    <!ELEMENT qapair (question,answer)>
    <!ELEMENT question (#PCDATA)>
    <!ELEMENT answer (#PCDATA)>
  ]>
  <exam course="cs203">
    <student>
      Fred Smith
    </student>
    <qapair>
      <question>Who is the last King of England</question>
      <answer>George VI</answer>
    </qapair>
    <qapair>
      <question>How many queens were named Elizabeth</question>
      <answer>Two</answer>
    </qapair>
  </exam>