Exam 3 Grading Guidelines

These are the grading guidelines that were used to grade the third exam.

Exam 3 grading guidelines

Page 2

Question 2

• -1 for not using int
• -1 per error

Question 3

• -1 for anything missing

Question 4

• -1 for anything missing
• No points off if the program exhibits the right behavior but has extra stuff

Question 5

• -1 for Exam3.compute() = count
• -1 for count.compute()
• -1 for not using Exam3
• No points off for extra stuff that still works properly

Question 6

• -1 for each one wrong

Page 3

Questions 7, 8 & 9

• -1 for using the mathematical ‘less than or equal to’ instead of <=
• -1 for = instead of = =
• -2 for using scanner input in the while condition
• -2 for “while(done)” without the !, in question 8
• -1 for creating a scanner
• -all pts for redeclaring given variables

Page 4

Question 10

• -1 if any of the keywords are missing: public, static, int, int x and int y(parameters)

Question 11

• -3 if static is missing
• -1 if private is missing

Page 5

Question 12

• -1 per part for anything wrong (if both parts are wrong, still only -1) (to a max of -8)

Question 13

• -4 if not nested, -2 if didn’t use variable names for NORMAL, REPAIR, etc.
• -2 for a minor error.

Page 6

Question 14

• -1 for each one wrong

Question 15

• 1pt each code bit:
  “int” “iarray[]” “= new” “int[5];” or
  “int[]” “iarray” “= new” “int[5];” or
  “int” “iarray[]” “= {#, #, #, #, #};” or
  “int[]” “iarray” “= {#, #, #, #, #};”

Question 16

• 1pt syntax
• 1pt for condition and counter variable init
• 1pt increment counter
• 1pt body

Question 17

• 2pts each

Page 7

Question 18a

• -1 additional declarations
• -1 if static
• -2 incorrect types

Question 18b

• -2 if fields are not assigned (unless correctly initialized to 1 and 1 in part a)
• -1 for static and/or return type
• -1 for a return statement
• -1 for incorrect method name
• -1 assigning something it shouldn’t (like value) but be lenient if it was declared in part a
• -1 for private methods

Question 18c

• -2 if fields are not assigned
• -1 for static and/or return type
• -1 for a return statement
• -1 for incorrect method name
• -1 assigning something it shouldn’t (like value) but be lenient if it was declared in part a (it’s okay if they check for nonnegativity)
• -1 for private methods

Page 8

Question 18d

• -1 use of parameter
• -1 method declaration
• -1 or 2 for string declaration
• -1 improper return
• -1 syntax

Question 18e

• Everybody got full credit for this, regardless of the answer

Question 19

• +1 if something is written
• +3 some idea of static declaration
• +5 or 6 not quite right
• +7 for full understanding

Question 20

• +1 if something is written
• +3 some idea of public vs. private declaration
• +5 or 6 not quite right
• +7 for full understanding