Java 2D Arrays_Review

Front

Which of the following statements correctly declares a two-dimensional integer array? Options: int Matrix[ ] = new int[5,4];, int Matrix[ ]; Matrix = new int[5,4];, int Matrix[ ][ ] = new int[5][4];, int Matrix[ ][ ] = int[5][4];

Back

int Matrix[ ][ ] = new int[5][4];

Front

How would you get the value 6 out of the following array int[][] a = {{2, 4, 6, 8}, {1, 2, 3, 4}};? Remember each set of curly braces represents a row, or a single dimensional array. Options: a [0][3], a [1][3], c) a[0][2], d) a[2][0], e) a[3][1]

Back

a[0][2]

Front

How many columns does a have if it is created as follows: int[][] a = {{2, 4, 6, 8}, {1, 2, 3, 4}};?

Back

4

Front

Given the code, what is the value of things.length ?

Back

3

Front

Given the code, what is in values[2][1] ?

Back

7.9

Front

Given the code, what is in values[0][1] ?

Back

9.0

Front

What value is at index 1 in this array?  String[] names = {"Mack", "Dennis", "Dee", "Charlie"};

Back

Dennis

Front

Selection Sort puts all of the items in an array in:

Back

ascending or descending

Front

What is in values[3][0] for the array: double[][] values = { {1.2, 9.0, 3.2}, {9.2, 0.5, 1.5, -1.2}, {7.3, 7.9, 4.8} } ?

Back

No such element exists in array

Front

Given the following:
int[][] items =
{ {0, 1, 3, 4},
{4, 3, 99, 0, 7 },
{3, 2} } ;
Which of the following statements replaces the 99 with 77?
Options: items[1][2] = 77; items[2][1] = 77; items[ 99 ] = 77; items[2][3] = 77;

Back

items[1][2] = 77;