quiz — random
    knowledge tests
  
    quiz | 
    [-t] [-i
      file] [question answer] | 
  
The quiz utility tests your knowledge of
    random facts. It has a database of subjects from which you can choose. With
    no arguments, quiz displays the list of available
    subjects.
The options are as follows:
  -t 
  - Use tutorial mode, in which questions are repeated later if you didn't get
      them right the first time, and new questions are presented less frequently
      to help you learn the older ones.
 
  -i 
  - Specify an alternate index file.
 
Subjects are divided into categories. You can pick any two
    categories from the same subject. Quiz will ask
    questions from the first category and it expects answers from the second
    category. For example, the command ``quiz victim killer'' asks questions
    which are the names of victims, and expects you to answer with the cause of
    their untimely demise, whereas the command ``quiz killer victim'' works the
    other way around.
If you get the answer wrong, quiz lets you
    try again. To see the right answer, enter a blank line.
The index and data files have a similar syntax. Lines in them
    consist of several categories separated by colons. The categories are
    regular expressions formed using the following meta-characters:
  - pat|pat
 
  - alternate patterns
 
  - {pat}
 
  - optional pattern
 
  - [pat]
 
  - delimiters, as in pat[pat|pat]pat
 
 
In an index file, each line represents a subject. The first
    category in each subject is the pathname of the data file for the subject.
    The remaining categories are regular expressions for the titles of each
    category in the subject.
In data files, each line represents a question/answer set. Each
    category is the information for the question/answer for that category.
The backslash character (``\'') is used to quote syntactically
    significant characters, or at the end of a line to signify that a
    continuation line follows.
If either a question or its answer is empty,
    quiz will refrain from asking it.
  - /usr/local/share/games/quiz.db
 
  - The default index and data files.
 
Quiz is pretty cynical about certain
    subjects.