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 minutes; four questions
• Can everybody see this line?

Quiz 8; October 26; three minutes

1. What are the names of the four ports of the port model for goal evaluation that we've discussed? Hint: Here's the first letter of each: c, e, r, f (one point for all four)
2. We think of backtracking as moving through the goals of a query or rule in a particular direction. What is that direction? (½ point)
3. For each of the following queries, indicate whether they succeed or fail. (½ point each)

   ?- length([1,2,3],Len).
   ?- append(A,B,[1,2,3]), writeln(A), fail.
   ?- member(X,[1,2,3]), member(X,[3,4,5]).
   

4. Write a predicate p(N) that prints the numbers between 1 and N inclusive. It always succeeds. (1½ points)

   ?- p(3).
   1
   2
   3
   true.