2008SSExamAnswers

2008SSExamAnswers - COMPSCI 101 THE UNIVERSITY OF AUCKLAND...

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COMPSCI 101 THE UNIVERSITY OF AUCKLAND CONTINUED SUMMER SEMESTER, 2008 Campus: City COMPUTER SCIENCE Principles of Programming (Time allowed: TWO hours) NOTE: Attempt ALL questions Write your answers in the space provided There is space at the back for answers that overflow the allotted space No calculators are permitted Surname: Forenames: Student ID number: Login name: Q1 (/20) Q4 (/6) Q7 (/6) Q10 (/8) Q2 (/8) Q5 (/6) Q8 (/8) Q11 (/10) Q3 (/8) Q6 (/10) Q9 (/10) TOTAL (/100)
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- 2 - COMPSCI 101 Question/Answer Sheet ID: . .................................................................... CONTINUED Question 1 (20 marks) a) What is the output of the following code? System.out.println(2 + 9 + "3" + 5 + (2 + 4)); 11356 (2 marks) b) What is the output of the following code? System.out.println(Math.max(3,5) + Math.min(4,9)); 9 (2 marks) c) Write a Java boolean expression which tests whether the String identified by the variable, name , is less than 10 characters long and contains the letter ‘ r ’. name.length() < 10 && name.indexOf('r') > -1 (2 marks)
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- 3 - COMPSCI 101 Question/Answer Sheet ID: . .................................................................... CONTINUED d) Complete the output of the following code. Rectangle a = new Rectangle(0, 1, 2, 3); Rectangle b = new Rectangle(10, 20, 30, 40); Rectangle c; c = b; b = new Rectangle(10, 20, 30, 40); System.out.println("1. " + a.equals(b)); System.out.println("2. " + (a == b)); System.out.println("3. " + a.equals(c)); System.out.println("4. " + (a == c)); System.out.println("5. " + b.equals(c)); System.out.println("6. " + (b == c)); 1. false 2. false 3. false 4. false 5. true 6. false (2 marks) e) What is printed by the following? int a = 5; int b = 10; if ((a < b) && !(b < 10)) { System.out.println("A"); } else { System.out.println("B"); } A (2 marks)
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- 4 - COMPSCI 101 Question/Answer Sheet ID: . .................................................................... CONTINUED f) The positive() method is called in the following way: boolean[] bs = {true, true, false, false}; double nums = positive(bs, "10"); Complete the method header for the positive() method (i.e. complete the first line of the method definition). private double positive ( boolean[] nums, String a ) { int x = Integer.parseInt(a); double d = 0.0; for (int i = 0; i < x; i++) { if (nums[i]) { d = d + 5; } } return d; } (2 marks) g) What is the output of the following code? String a = "100"; System.out.println(a + 1); System.out.println(Integer.parseInt(a) + 1); 1001 101 (2 marks)
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- 5 - COMPSCI 101 Question/Answer Sheet ID: . .................................................................... CONTINUED h) What is printed by the following code segment?
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This note was uploaded on 03/01/2012 for the course COMPSCI 101 taught by Professor Adrianaferraro during the Summer '12 term at Auckland.

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2008SSExamAnswers - COMPSCI 101 THE UNIVERSITY OF AUCKLAND...

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