Unit 3 - Arrays

Question 1

data structure

Answer 1

a storage that is used to store and organize related data

Question 2

array

Answer 2

a numbered list that stores related data items (same type)

Question 3

ArrayList

Answer 3

a resizable array

Question 4

dynamic resizing

relateds to Array:Lists

Answer 4

the ArrayList grows as items are added and shrinks when items are removed

array is fixed in size

Question 5

element

Answer 5

an item in an array

Question 6

index

Answer 6

the location/position of an item in an array

Question 7

length

instance variable called field

Answer 7

the number of elements in an array

Question 8

initializer

Answer 8

can set the elements of the array, a common-separated list of expressions enclos in braces

Question 9

bounds checking

off-by-one error

Answer 9

making sure array indices are greater than or equal to 0 and less than the length of the array; out of bounds b/c index is too high or too low

singular - index, plural - indices

Question 10

enhanced for statement

a.k.a for-each loop

Answer 10

a special loop that iterates through the elements of an array without using a counter, it avoids the possibility of “stepping outside” of the array
ex. for (parameter : arrayName)
statement

Question 11

pass-by-value

call-by-value

Answer 11

a copy of an argument’s value is passed to the called method; the method uses the the copy and the original value is not changed

Question 12

pass-by-reference

call-by-reference

Answer 12

a reference of the argument’s value is passed to the method; the method can access the actual parameter and modify its value

Question 13

two-diemensional array

a.k.a matrix

Answer 13

used to represent table of values consisting of information arranged in rows and columns

Question 14

command-line arguments

Answer 14

is an argument passed at the time of running the program

Question 15

Array class

Answer 15

a class from the java utility package that provides static methods for common array manipulations