Questions refer to the Ticket and Transaction classes below public class Ticket { private String row; private int seat; private double price; //constructor public Ticket(String aRow, int aSeat, double aPrice) { row = aRow; seat = aSeat; price = aPrice; } //accessors getRow(), getSeat(), and getPrice() ... } public class Transaction { private int numTickets; private Ticket[] tickList; //constructor public Transaction(int numTicks) { numTickets = numTicks; tickList = new Ticket[numTicks]; String theRow; int theSeat; double thePrice; for (int i = 0; i < numTicks; i++) { < read user input for theRow, theSeat, and thePrice > ... /* more code */ } } /** @return total amount paid for this transaction */ public double totalPaid() { double total = 0.0; /* code to calculate amount */ return total; } } Which represents correct /* code to calculate amount */ in the totalPaid method?

Refer to the following code segment. You may assume that array arr1 contains elements arr1[0], arr1[1], . . . , arr1[N-1] , where N = arr1.length . int count = 0; for (int i = 0; i < N; i++) { if (arr1[i] != 0) { arr1[count] = arr1[i]; count++; } } int[] arr2 = new int[count]; for (int i = 0; i < count; i++) { arr2[i] = arr1[i]; } If array arr1 initially contains the elements 0, 6, 0, 4, 0, 0, 2 in this order, what will arr2 contain after execution of the code segment?

Consider this class: public class BingoCard { private int[] card; /** Default constructor: Creates BingoCard with * 20 random digits in the range 1 - 90. */ public BingoCard() { /* implementation not shown */ } /* Display BingoCard. */ public void display() { /* implementation not shown */ } ... } Assuming that players has been declared as an array of BingoCard , which of the following is a correct replacement for /* construct each BingoCard */ ? I for (BingoCard card : players) card = new BingoCard(); II for (BingoCard card : players) players[card] = new BingoCard(); III for (int i = 0; i < players.length; i++) players[i] = new BingoCard();

Which of the following initializes an 8 × 10 matrix with integer values that are perfect squares? (0 is a perfect square.) I int[][] mat = new int[8][10]; II int[][] mat = new int[8][10]; for (int r = 0; r < mat.length; r++) for (int c = 0; c < mat[r].length; c++) mat[r][c] = r * r; III int[][] mat = new int[8][10]; for (int c = 0; c < mat[r].length; c++) for (int r = 0; r < mat.length; r++) mat[r][c] = c * c;

Consider the following method that will alter the matrix mat : /** @param mat the initialized matrix * @param row the row number */ public static void matStuff(int[][] mat, int row) { int numCols = mat[0].length; for (int col = 0; col < numCols; col++) mat[row][col] = row; } Suppose mat is originally 1 4 9 0 2 7 8 6 5 1 4 3 After the method call matStuff(mat,2) , matrix mat will be