True or False? When you create an array using the following statement, the element values are automatically initialized to 0.int[][] matrix = new int[5][5]; Group of answer choicesTrueFalse Flag question: Question 2Question 21 ptsWhich of the following statements are correct? Group of answer choiceschar[][] charArray = {'a', 'b'};char[2][2] charArray = {{'a', 'b'}, {'c', 'd'}};char[2][] charArray = {{'a', 'b'}, {'c', 'd'}};char[][] charArray = {{'a', 'b'}, {'c', 'd'}}; Flag question: Question 3Question 31 ptsWhat is the indexed variable for the element at the first row and first column in array a?Group of answer choicesa[0][0]a[1][1]a[0][1]a[1][0] Flag question: Question 4Question 41 ptsGiven double[][] x = new double[4][5], what are x.length and x[2].length? Group of answer choices4 and 44 and 55 and 45 and 5 Flag question: Question 5Question 51 ptsHow many elements are in the array matrix, int[][] matrix = new int[5][5]?Group of answer choices14202530 Flag question: Question 6Question 61 ptsAssume int[][] x = {{1, 2}, {3, 4}, {5, 6}}, what are x.length and x[0].length? Group of answer choices3 and 32 and 23 and 22 and 3 Flag question: Question 7Question 71 ptsAnalyze the following code:public class Test { public static void main(String[] args) { boolean[][] x = new boolean[3][]; x[0] = new boolean[1]; x[1] = new boolean[2]; x[2] = new boolean[3]; System.out.println("x[2][2] is " + x[2][2]); } } Group of answer choicesThe program has a compile error because new boolean[3][] is wrong.The program has a runtime error because x[2][2] is null.The program runs and displays x[2][2] is null.The program runs and displays x[2][2] is true.The program runs and displays x[2][2] is false. Flag question: Question 8Question 81 ptsWhat is the output of the following code?public class Test { public static void main(String[] args) { int[][] matrix = {{1, 2, 3, 4}, {4, 5, 6, 7}, {8, 9, 10, 11}, {12, 13, 14, 15}}; for (int i = 0; i < 4; i++) System.out.print(matrix[i][1] + " "); } } Group of answer choices1 2 3 44 5 6 71 3 8 122 5 9 133 6 10 14 Flag question: Question 9Question 91 ptsHow do you declare a 2-dimensional array in Java? Group of answer choicesint[][] array;int array[][];int[] array[];All of the above Flag question: Question 10Question 101 ptsWhat is the output of the following Java code snippet? int[][] numbers = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}}; System.out.println(numbers[1][2]); Group of answer choices1689 Flag question: Question 11Question 111 ptsWhat exception is thrown if you try to access an element at the index out of bounds in a two-dimensional array in Java? Group of answer choicesArrayIndexOutOfBoundsExceptionIndexOutOfBoundsExceptionOutOfBoundsExceptionNoSuchElementException Flag question: Question 12Question 121 ptsGiven the statement below, how many elements does testArray contain? int[][] testArray = {{1, -2, 3}, {}, {5, 6}}; Group of answer choices356The code will result in a compilation error
Question
True or False? When you create an array using the following statement, the element values are automatically initialized to 0.int[][] matrix = new int[5][5]; Group of answer choicesTrueFalse Flag question: Question 2Question 21 ptsWhich of the following statements are correct? Group of answer choiceschar[][] charArray = {'a', 'b'};char[2][2] charArray = {{'a', 'b'}, {'c', 'd'}};char[2][] charArray = {{'a', 'b'}, {'c', 'd'}};char[][] charArray = {{'a', 'b'}, {'c', 'd'}}; Flag question: Question 3Question 31 ptsWhat is the indexed variable for the element at the first row and first column in array a?Group of answer choicesa[0][0]a[1][1]a[0][1]a[1][0] Flag question: Question 4Question 41 ptsGiven double[][] x = new double[4][5], what are x.length and x[2].length? Group of answer choices4 and 44 and 55 and 45 and 5 Flag question: Question 5Question 51 ptsHow many elements are in the array matrix, int[][] matrix = new int[5][5]?Group of answer choices14202530 Flag question: Question 6Question 61 ptsAssume int[][] x = {{1, 2}, {3, 4}, {5, 6}}, what are x.length and x[0].length? Group of answer choices3 and 32 and 23 and 22 and 3 Flag question: Question 7Question 71 ptsAnalyze the following code:public class Test { public static void main(String[] args) { boolean[][] x = new boolean[3][]; x[0] = new boolean[1]; x[1] = new boolean[2]; x[2] = new boolean[3]; System.out.println("x[2][2] is " + x[2][2]); } } Group of answer choicesThe program has a compile error because new boolean[3][] is wrong.The program has a runtime error because x[2][2] is null.The program runs and displays x[2][2] is null.The program runs and displays x[2][2] is true.The program runs and displays x[2][2] is false. Flag question: Question 8Question 81 ptsWhat is the output of the following code?public class Test { public static void main(String[] args) { int[][] matrix = {{1, 2, 3, 4}, {4, 5, 6, 7}, {8, 9, 10, 11}, {12, 13, 14, 15}}; for (int i = 0; i < 4; i++) System.out.print(matrix[i][1] + " "); } } Group of answer choices1 2 3 44 5 6 71 3 8 122 5 9 133 6 10 14 Flag question: Question 9Question 91 ptsHow do you declare a 2-dimensional array in Java? Group of answer choicesint[][] array;int array[][];int[] array[];All of the above Flag question: Question 10Question 101 ptsWhat is the output of the following Java code snippet? int[][] numbers = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}}; System.out.println(numbers[1][2]); Group of answer choices1689 Flag question: Question 11Question 111 ptsWhat exception is thrown if you try to access an element at the index out of bounds in a two-dimensional array in Java? Group of answer choicesArrayIndexOutOfBoundsExceptionIndexOutOfBoundsExceptionOutOfBoundsExceptionNoSuchElementException Flag question: Question 12Question 121 ptsGiven the statement below, how many elements does testArray contain? int[][] testArray = {{1, -2, 3}, {}, {5, 6}}; Group of answer choices356The code will result in a compilation error
Solution
Sure, here are the answers to your questions:
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True. In Java, when you create an array of integers, the elements are automatically initialized to 0.
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The correct statement is: char[][] charArray = {{'a', 'b'}, {'c', 'd'}};
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The indexed variable for the element at the first row and first column in array a is a[0][0].
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Given double[][] x = new double[4][5], x.length is 4 and x[2].length is 5.
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The array matrix, int[][] matrix = new int[5][5], has 25 elements.
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Assume int[][] x = {{1, 2}, {3, 4}, {5, 6}}, x.length is 3 and x[0].length is 2.
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The program runs and displays x[2][2] is false. In Java, boolean arrays are initialized to false.
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The output of the code is 2 5 9 13. It prints the second element of each row.
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All of the above are correct ways to declare a 2-dimensional array in Java.
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The output of the Java code snippet is 6. It prints the third element of the second row.
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The exception thrown if you try to access an element at the index out of bounds in a two-dimensional array in Java is ArrayIndexOutOfBoundsException.
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The statement int[][] testArray = {{1, -2, 3}, {}, {5, 6}}; contains 5 elements.
Similar Questions
True or False? When you create an array using the following statement, the element values are automatically initialized to 0.int[][] matrix = new int[5][5]; Group of answer choicesTrueFalse
Which of the following statements are correct? Group of answer choiceschar[][] charArray = {'a', 'b'};char[2][2] charArray = {{'a', 'b'}, {'c', 'd'}};char[2][] charArray = {{'a', 'b'}, {'c', 'd'}};char[][] charArray = {{'a', 'b'}, {'c', 'd'}};
Which of the following array creation statements are incorrect? Please select all that apply.Group of answer choicesint[] a = new int[2];int a[] = new int[2];int[] a = new int(2);int a = new int[2];int a() = new int[2];
How can you initialize an array of two characters to 'a' and 'b'? Please select all that apply.Group of answer choiceschar[] charArray = new char[2]; charArray = {'a', 'b'};char[2] charArray = {'a', 'b'};char[] charArray = {'a', 'b'};char[] charArray = new char[2]; charArray[0] = 'a'; charArray[1] = 'b';
Which of the following correctly creates an array of five empty Strings?Group of answer choicesString[] a = new String [5];String[] a = {"", "", "", "", ""};String[5] a;String[ ] a = new String [5]; for (int i = 0; i < 5; i++) a[i] = null;
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