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2011SSExamAnswers

# 2011SSExamAnswers - THE UNIVERSITY OF AUCKLAND SUMMER...

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THE UNIVERSITY OF AUCKLAND SUMMER SEMESTER, 2011 Campus: City COMPUTER SCIENCE Principles of Programming (Time Allowed: TWO hours) NOTE: You must answer all questions in this exam. No calculators are permitted Answer in the space provided in this booklet. There is space at the back for answers that overflow the allotted space. Surname Forenames Student ID Login (UPI) Q1 (/8) Q4 (/8) Q7 (/13) Q10 (/7) Q2 (/9) Q5 (/6) Q8 (/9) Q11 (/7) Q3 (/8) Q6 (/5) Q9 (/10) Q12 (/10) Total (/100)

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Question/Answer Sheet - 30 - CompSci 101 ID: . .......................................................... Question 1 (8 marks) a) What output is produced by the following code? int a = 4; int b = 6; double c = b % a; System.out.println(a + a + ", " + b * c + 1); 8, 12.01 (2 marks) b) Complete the output of the following code. int a = 4; int b = a + 6; double c = 1.0 * b / a; a = a + (int) (a * c) + 1; b++; System.out.println("a: " + a + " b: " + b + " c: " + c); a: 15 b: 11 c: 2.5 (2 marks)
Question/Answer Sheet - 30 - CompSci 101 ID: . .......................................................... c) What output is produced by the following code? int x = 13; int y = 5; if (x < 10) { if (y != 5) { System.out.println("A"); } else { System.out.println("B"); } } else if (y > 10) { System.out.println("C"); } else { if (y != 5) { System.out.println("D"); } else { System.out.println("E"); } } E (2 marks) d) In the space provided below, assign a value for the variable, y , so that the output of the section of code is: int x = 8; int y = 6; //any even integer < 7 if (x < 10 && !(y > 7 || y == x)) { if (y % 2 == 0) { System.out.println("AA"); } else { System.out.println("BB"); } } else if (y > 2) { System.out.println("CC"); } (2 marks) AA

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Question/Answer Sheet - 30 - CompSci 101 ID: . .......................................................... Question 2 (9 marks) a) What output is produced by the following code? boolean[] a1 = { true, false, false, true }; boolean[] a2 = { false, false, true, true }; for (int i = 0; i < a1.length; i++) { System.out.print((a1[i] || !a2[i]) + " "); } true true false true (3 marks) b) Complete the output when the following code is executed. String[] s = new String[4]; s[0] = "0"; for (int i = 1; i < s.length; i++) { s[i] = s[i-1] + s[i-1].length(); } System.out.print("s: "); for (int i = 1; i < s.length; i++) { System.out.print(s[i] + " "); } s: 01 012 0123 (3 marks)
Question/Answer Sheet - 30 - CompSci 101 ID: . .......................................................... c) What output is produced by the following code? String[] array = { "3", "to", "One" }; for (int i = 0; i < array.length; i++) { array[i] = "-" + array[i].length(); } for (int i = 0; i < array.length; i++) { System.out.print(i + array[i] + ","); } 0-1,1-2,2-3, (3 marks)

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Question/Answer Sheet - 30 - CompSci 101 ID: . ..........................................................
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2011SSExamAnswers - THE UNIVERSITY OF AUCKLAND SUMMER...

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