2D Arrays

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

• 7.9

• 9.2

• 7.3

• 0.5

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

• 4

• 3

• 12

• 7

Given the following:

double [][] stuff ;

Which of the following statements constructs an array with 5 rows of 7 columns each and assign its reference to stuff ?

• stuff = new stuff[5][7] ;

• stuff = new double[5][7] ;

• new stuff = double[5][7] ;

• stuff = double new[5][7] ;

Given the code, which of the following fragments prints out every element of items?

• 
• 
• 
• 

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

• int Matrix[ ] = new int[5,4];

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

• int Matrix[ ][ ] = new int[5][4];

• int Matrix[ ][ ] = int[5][4];

How would you get the value "6" out of the following array?

• a [0][3]

• a [1][3]

• a[0][2]

• a[2][0]

• a[3][1]

What would the statement a[1].length return?

• 3

• 4

• 2

• 1

How can I store the value 10 into the second row, first column of my array that I have declared as int numbers[10][10]?

• int numbers[1][2] = 10;

• numbers[1][2] = 10;

• numbers[2][3] = 10;

• numbers[1][0] = 10

Consider the following code segment, where letters is a two-dimensional (2D) array that contains possible letters. The code segment is intended to print "PIG".

String[][] letters = { {"A", "B", "C", "D"},

{"E", "F", "G", "H"},

{"I", "J", "K", "L"},

{"M", "N", "O", "P"}};

System.out.println( /* missing code */ );

Which of the following could replace /* missing code */ so that the code segment works as intended?

• letters[4][4] + letters[3][1] + letters[2][3]

• letters[3][3] + letters[2][0] + letters[1][2]

• letters[4][3] + letters[3][0] + letters[2][2]

• letters[3][3] + letters[0][2] + letters[2][1]

• letters[4][4] + letters[1][3] + letters[3][2]

Consider the following two-dimensional array words.

String[][] words = { {"about", "actor", "admit", "agile"},

{"badge", "basic", "berry", "bingo"},

{"cacti", "cedar", "chair", "close"}};

What is the fifth element visited when row-major traversal is performed on words?

• about

• agile

• badge

• basic

• cedar