Unit 2 (Strings and Classes) Flashcards
(12 cards)
1
Q
array definition
A
int[] num = new int[length];
int [] num = {1, 2, 3, 4, 5};
Arrays are fixed in length
1
Q
2d array definition
A
int[][] matrix = {
{1, 2, 3, 4},
{5, 6, 7, 8},
{9, 10, 11, 12}
};
int[][] jagged = new int[3][];
jagged[0] = new int[2];
jagged[1] = new int[4];
jagged[2] = new int[1];
2
Q
order of operations
A
() []
++, –
% / *
+, -
< > <= >=
== !=
&&
||
= += -= etc
3
Q
When to use .length vs .length()
A
.length for arrays
.length() for strings
4
Q
The size of an array is immutable. You cannot ever change the size of an array
A
Check the answers when tracing to eliminate any options with changed array length
5
Q
when iterating thru a array, what is the iteration
A
(int x: arr){
}
6
Q
when iterating thru a 2d array, what is the iteration
A
7
Q
A
8
Q
A
9
Q
A
10
Q
A
11
Q
A
