Please keep all answers short and to the point. Read each question and answer it; don't add information that wasn't asked for.

1. (50 points) Tell, in words, what each of the following patterns will match.
   
   
   1. a+
      
      
      
   2. abc+
      
      
      
      
   3. \s*
      
      
      
      
   4. [0-9]
      
      
      
      
   5. [^aeiou]
      
      
      
      
   6. .*
      
      
      
      
   7. (fish|fowl)
      
      
      
      
   8. </[^>]>
      
      
      
      
   9. [a-z_A-Z][a-z_A-Z0-9]+
      
      
      
      
   10. (\d*\.\d+)|(\d+\.\d*)
       
       
       
       
2. (15 points) There are three ways you can use a regular expression to try to match a string. What are those three ways? (Short answers, please.)
   
   
   
   
   
   
   
   
   
3. (5 points) Write the regular expression \d+\.\d+ as a Java quoted String.
   
   
   
   
4. (15 points) Write the Java statements (not a complete program!) to set a boolean variable b to true if and only if the string s contains a digit.
   
   
   
   
   
   
   
   
   
   
5. (5 points) By default, quantifiers are greedy. What does this mean?
   
   
   
   
   
6. (10 points) If you apply the regular expression ([a-z]*)([0-9]+)([a-z]*) to the string abc123xyz
   
   
   1. What characters are matched by the second capturing group?
      
      
      
   2. What characters are matched by the zeroth capturing group?