CIS265 - Spring Exam 2 First Name Last Name CSU#

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1 CIS265 - Spring Exam 2 First Name Last Name CSU# MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) An instance of describes system errors. If this type of error 1) occurs, there is little you can do beyond notifying the user and trying to terminate the program gracefully. A) Throwable B) Exception C) RuntimeException D) Error E) NumberFormatException 2) The following code causes Java to throw. int number = Integer.MAX_VALUE + 1; A) RuntimeException B) Throwable C) Exception D) Error E) no exceptions 3) What exception type does the following program throw? 2) 3) System.out.println(1 / 0); A) No exception B) ArithmeticException C) StringIndexOutOfBoundsException D) ArrayIndexOutOfBoundsException E) ClassCastException 4) What exception type does the following program throw? 4) int[ ] list = new int[5]; System.out.println(list[5]); A) StringIndexOutOfBoundsException B) ArithmeticException C) ClassCastException D) No exception E) ArrayIndexOutOfBoundsException

2 5) What is the output of running class Test? 5) new Circle9(); public abstract class GeometricObject { protected GeometricObject() { System.out.print("A"); protected GeometricObject(String color, boolean filled) { System.out.print("B"); public class Circle9 extends GeometricObject { /** Default constructor */ public Circle9() { this(1.0); System.out.print("C"); /** Construct circle with a specified radius */ public Circle9(double radius) { this(radius, "white", false); System.out.print("D"); /** Construct a circle with specified radius, filled, and color */ public Circle9(double radius, String color, boolean filled) { super(color, filled); System.out.print("E"); A) BEDC B) BACD C) ABCD D) AEDC E) CBAE 6) Which of the following declares an abstract method in an abstract Java class? A) public abstract method(); B) public abstract void method(); C) public abstract void method() { D) public void abstract Method(); E) public void method() { 6)

3 7) What is the return value for xmethod(4) after calling the following method? 7) static int xmethod(int n) { if (n == 1) return 1; else return n + xmethod(n - 1); A) 12 B) 9 C) 10 D) 11 8) Fill in the code to complete the following method for checking whether a string is a palindrome. 8) public static boolean ispalindrome(string s) { if (s.length() <= 1) // Base case return true; else if return false; else return ispalindrome(s.substring(1, s.length() - 1)); A) (s.charat(1)!= s.charat(s.length() - 1)) // Base case B) (s.charat(0)!= s.charat(s.length() - 1)) // Base case C) (s.charat(0)!= s.charat(s.length())) // Base case D) (s.charat(1)!= s.charat(s.length())) // Base case 9) Analyze the following recursive method. 9) public static long factorial(int n) { return n * factorial(n - 1); A) Invoking factorial(2) returns 2. B) Invoking factorial(0) returns 0. C) Invoking factorial(3) returns 6. D) Invoking factorial(1) returns 1. E) The method runs infinitely and causes a StackOverflowError. 10) The printout from the following code is. 10) java.util.arraylist list = new java.util.arraylist(); list.add("new York"); java.util.arraylist list1 = list; list.add("atlanta"); list1.add("dallas"); System.out.println(list1); A) [New York, Atlanta] B) [New York, Dallas] C) [New York, Atlanta, Dallas] D) [New York]

4 11) Analyze the following program. 11) class Test { try { String s = "5.6"; Integer.parseInt(s); // Cause a NumberFormatException int i = 0; int y = 2 / i; System.out.println("Welcome to Java"); catch (Exception ex) { System.out.println(ex); A) The program compiles and runs without exceptions. B) The program has a compilation error. C) An exception is raised due to Integer.parseInt(s); D) An exception is raised due to 2 / i; 12) Analyze the following code: 12) int[ ] x = {1, 2, 3, 4, 5; xmethod(x, 5); public static void xmethod(int[ ] x, int length) { System.out.print(" " + x[length - 1]); xmethod(x, length - 1); A) The program displays and then raises an ArrayIndexOutOfBoundsException. B) The program displays C) The program displays D) The program displays and then raises an ArrayIndexOutOfBoundsException.

5 13) Fill in the code to complete the following method for sorting a list. 13) public static void sort(double[ ] list) { ; public static void sort(double[ ] list, int high) { if (high > 1) { // Find the largest number and its index int indexofmax = 0; double max = list[0]; for (int i = 1; i <= high; i++) { if (list[i] > max) { max = list[i]; indexofmax = i; // Swap the largest with the last number in the list list[indexofmax] = list[high]; list[high] = max; // Sort the remaining list sort(list, high - 1); A) sort(list, list.length - 1) B) sort(list, list.length) C) sort(list, list.length - 2) D) sort(list) 14) Fill in the code to complete the following method for checking whether a string is a palindrome. 14) public static boolean ispalindrome(string s) { return ispalindrome(s, 0, s.length() - 1); public static boolean ispalindrome(string s, int low, int high) { if (high <= low) // Base case return true; else if (s.charat(low)!= s.charat(high)) // Base case return false; else return ; A) ispalindrome(s, low, high - 1) B) ispalindrome(s, low + 1, high) C) ispalindrome(s, low, high) D) ispalindrome(s) E) ispalindrome(s, low + 1, high - 1)

6 15) What exception type does the following program throw? 15) Object o = new Object(); String d = (String)o; A) StringIndexOutOfBoundsException B) ClassCastException C) ArrayIndexOutOfBoundsException D) No exception E) ArithmeticException PART2 Java Programming (35 points) Write a Java method that returns a re-arranged version of the input list. The input list contains an arbitrary sequence of Geometric Objects (Circle & Rectangle Type these objects are similar to the ones you handled in Homework2). Your method must place circles at the beginning of the list (in any order), followed by rectangles (in any order). However; the first element of the entire output list must be the figure with the largest area. NOTES: You are not allowed to modify the data or order of the input list. You cannot use any system provided Sort method. GeometricObjects are similar to those used in Homework2 (do not write them!) public static ArrayList<GeometricObject> cirrecbiggestfirst (ArrayList<GeometricObject> list )

9 1) D 2) E 3) B 4) E 5) A 6) B 7) C 8) B 9) E 10) C 11) C 12) D 13) A 14) E 15) B

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

CSC-220 Exam4 on Chapters 18 and 24. Closed Book, Closed Notes, Closed Internet MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) What are the base