Practice Exam 3 - Computer Science I - Fall 2007 | CS 1113, Exams of Computer Science

Download Practice Exam 3 - Computer Science I - Fall 2007 | CS 1113 and more Exams Computer Science in PDF only on Docsity! Print name, family name first: _____________________________ Lab section ______ CS 1113 Exam 3’ 29 November 2007 Closed book exam; calculator and one sheet of notes allowed. You may declare new variables wherever needed. (15) 1. Given the following Java declarations, what numerical result is stored into the variable on the left of the “=” by each of the assignment statements? If there is an error in the statement, write “Error:” and explain what the error is. int iX; double dX; (a) iX = -2 + 19 / 3 * 3 % 5 + 3; (b) iX = (int) 3.9 + 2.0; (c) dX = (11 / (double) 4 * 2.0); (d) iX = 29 / 2 / 3; (e) dX = (double) (27 / 4); (15) 2. What is printed by the following Java program? public class Exam3 { public static void main(String[] args) { int iX = 8; changeIt(iX); System.out.println(iX); } private static void changeIt(int iX) { System.out.println(iX); iX = 7; System.out.println(iX); } } 3. public class Employee has instance variables name (a String) and idNum (an int). Below, write (5) (a) The public class statement and the instance variable statements (5) (b) The constructor (5) (c) An accessor method getNum to get the value of idNum (5) (d) A mutator method setName to change the value of name (5) (e) An equals method