TWO-DIMENSIONAL ARRAYS

Which of the following statements correctly declares a two-dimensional integer array?

• int Matrix[ ][ ] = new int[5][4];

• int Matrix[ ] = new int[5,4];

• int Matrix[ ][ ] = int[5][4];

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

How many columns does a have if it is created as follows

int[][] a = {{2, 4, 6, 8}, {1, 2, 3, 4}};?

• 1

• 2

• 3

• 4

What is the output of the following code?

• { {3, 2, 1}, {2, 4, 4} }

• { {4, 4, 2}, {2, 4, 4} }

• { {6, 4, 2}, {2, 4, 6} }

• { {3, 2, 1}, {1, 4, 8} }

Which of the following statements assigns the letter S to the third row and first column of a two-dimensional array named strGrid?

• strGrid[0][2] = "S";

• strGrid[1][3] = "S";

• strGrid[3][1] = "S";

• strGrid[2][0] = "S";

• strGrid[0][0] = "S";

Examine the following:

double[][] values =

{ {1.2, 9.0, 3.2},

{9.2, 0.5, 1.5, -1.2},

{7.3, 7.9, 4.8} } ;

what is in values[2][1] ?

• 7.3

• 7.9

• 9.2

• There is no such array element.