Java Chapter 8 Multidimensional and Ragged Arrays- Test Questions and Answers| Latest Update

Java Chapter 8 Multidimensional and Ragged Arrays-
Test Questions and Answers| Latest Update

How would you create a two-dimensional array variable "matrix" of 5 rows and 5 columns
✔️✔️int[][] matrix = new int[5][5];



Initialize a new, 3x3 two-dimensional array named arr with ones in each place ✔️✔️int[][] arr = {
{1, 1, 1}, {1, 1, 1}, {1, 1, 1}, }


How do you get the length of the one-dimensional array at index 0 of array arr?
✔️✔️arr[0].length



What is a ragged array? ✔️✔️A two-dimensional array with rows of different lengths



How do you initialize a 2D array without knowing the length of each row ✔️✔️int[][] arr = new
int[numRows][];



How are elements in two-dimensional arrays accessed ✔️✔️through a row and column index



how do you declare a new two-dimensional array? ✔️✔️elementType[][] arrayName;



how would you declare a two-dimensional array variable "matrix" of int values? ✔️✔️int[][]
matrix;