Marking guide for mock exam.


Marks for partial credit may differ if there is evidence of testing.
Appropriate testing consists of checking the sample runs given in the
exam and uses of QuickCheck; see functions marked 'test' and 'prop' in
the sample solution.


* Award full marks if the solution is correct.

    1abc.      12 marks
    2ab, 3ab.  16 marks.
   

* If the solution is not entirely correct, but contains only minor
  errors such as

    misplaced comma
    mispelled or wrong name or operator
    wrong brackets
    wrong order in application

  If there is evidence of testing:

    1abc.      9 marks
    2ab, 3ab.  12 marks.

  If there is no evidence of testing:

    1abc.      8 marks
    2ab, 3ab.  11 marks.


* If the solution is on the right track, but contains serious errors
  such as:

    missing a filter, guard, or condition
    missing an accumulation function
    returning a list where a single value is required, or vice versa
    using two qualifiers in place of a zip

  If there is evidence of testing:

    1abc.      6 marks
    2ab, 3ab.  8 marks.

  If there is no evidence of testing:

    1abc.      4 marks
    2ab, 3ab.  6 marks


* If the solution is in roughly the correct form (comprehension or
  recursion, but its content is nonsense.

  If there is evidence of testing:

    1abc.      3 marks
    2ab, 3ab.  4 marks.

  If there is no evidence of testing:

    1abc.      1 marks
    2ab, 3ab.  2 marks


* Give feedback to the student, but deduct no points, if there
  are 'bad smells' such as the following:

    an unnecessary equation.
    an unnecessary branch.
    an inappropriate variable name (e.g., xs when not a list).
    a test that a Boolean is true (e.g., e == True rather than e)