8 - Arrays

Question 1

An array

Answer 1

is a simple but powerful programming language construct use to group and organize data.

Question 2

An array of size N is indexed…

Answer 2

from 0 to N-1.

Question 3

In Java, an array is an object …

Answer 3

that must be instantiated.

Question 4

Int[ ] (type of array) height (name of array) =

Answer 4

new int[11] (size of array)

Question 5

Automatic bounds checking

Answer 5

ensures that the index is in range for the array being referenced.

Question 6

Int[ ] grades is better than

Answer 6

Int grades [ ] but both are acceptable

Question 7

An initializer list can be used to instantiate an array object instead of using the new operator.

Answer 7

Int [ ] scores = {12, 13, 14, 15} (this array would have a size of 4)

Question 8

An entire array can be passed as a parameter, making the formal parameter an alias of the original.

Answer 8

(**** NEED EXAMPLE **)

Question 9

Instantiating and array of objects reserves…

Answer 9

room to store references only. The objects that are stored in each element much be instantiated separately.

Question 10

Command-line arguments are stored in…

Answer 10

an array of String objects and are passed to the main method.

Example public static void main(String[ ] args)
Command line accessed through args [0]

Question 11

A java method can be defined to accept a varying number of parameters.

Answer 11

Example public void test(int count, String name, double . . . nums)

Question 12

Int [ ] [ ] table = new int510

Answer 12

(multi-dimensional array)
	1 2 3 4 5 6 7 8 9 10
	2
	3
	4
	5

Question 13

Using an array with more than two dimensions …

Answer 13

is rare in an object-oriented system.