Java quiz. Given a two-dimensional array (matrix) <pre><code

Given a two-dimensional array (matrix)


int[][] arr = {{1,2,3}, {0,0,0}, {3,2,1}};

Which of the answer choices allow to iterate over all the elements of an array and display them on the screen by means of for-each statement?

 for (int i : arr[]) { for (int j[] : i) System.out.print(j + " "); System.out.println(); }

 for (int i[] : arr) { for (int j : i) System.out.print(j + " "); System.out.println(); }

 for (int i[] : arr) { for (int j : i[]) System.out.print(j + " "); System.out.println(); }

 for (int i : arr) { for (int j : i) System.out.print(j + " "); System.out.println(); }

With the for-each statement it can`t be done

Explanation

Since a multidimensional array is, in fact, an array of references to other arrays of dimension length-1, an i[] statement will allow to iterate over all the rows of the matrix for each of which j will allow to iterate over all the elements of the given row.