Quiz Stuff

• Use a full sheet of 8½ x 11" paper. (Half sheet? Half credit!)
• Put your last name and first initial in the far upper left hand corner!
  
• No need to write out questions.
• Numbering responses may help you avoid overlooking a question; it's ok to go ahead and pre-number your sheet.
• Time: 3:30; Four one-point questions and a half-point EC

Quiz 8; March 1; Time: 3:30; 4 points

1. What are the names of the ports in the four port model?
2. What does Prolog do if a rule's very first clause fails?
3. What is the output of the following query?
   ?- A=5, writeln(A), write(B), B=7, B=A, write(done).
4. Write a rule positive(N) that succeeds iff (if and only if) N is an integer that is greater than zero.
?- positive(5).
true.
?- positive(apple).
false.