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?

• 
• 
• 
• 

Each piece of data in an array is BEST described as a what?

• Integer and string

• Item

• Element

• Elephant

Which BEST describes an array?

• A data structure - Stores a collection of values under one name

• A data collection - Stores a structure of values under one name

• A list - Stores a list of numbers

• A list - Stores a list of strings

Each element in an array can be accessed using its what?

• By counting in the items in the array

• Position or index in the array

• By printing the items in the array

• By printing and counting the entire array

Why are arrays useful?

• It saves storage space storing under one name

• You can store integers and strings together

• You can store thing related on different topics

• You may have lots of related data that you don't want to store separately

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]

• c) a[0][2]

• d) a[2][0]

• e) a[3][1]