Advanced Arrays Flashcards
What is the range of numeric indices for an array of size N?
0 to (N-1).
What is one advantage of using arrays?
Code optimization for efficient data retrieval or sorting.
What is a disadvantage of using arrays?
Fixed size
How is a specific value in an array referenced?
Using the array name followed by the index in brackets.
e.g array[i]
How do you declare an array in Java?
int[] array;
What does instantiating an array mean?
Creating an array object with a specified size.
What is bounds checking in arrays?
Ensures that an index used must specify a valid element.
0 to N-1
What exception is thrown if an array index is out of bounds?
ArrayIndexOutOfBoundsException.
What is an initializer list in arrays?
A way to instantiate and initialize an array in one step.
e.g int[] array = {1,67,42,7,9}
Fill in the blank: An entire array can be passed as a ______ to a method.
parameter.
What is a two-dimensional array?
An array that can be thought of as a table of elements with rows and columns.
How is a two-dimensional array declared in Java?
By specifying the size of each dimension separately.
e.g int[][]array = {{1, 8}, {6, 80}, {4, 23}}
What does the length property of a 2D array return?
The number of rows in the array.
What is the purpose of nested for loops in processing 2D arrays?
To process each element in the array.
For Loop within a For Loop
What is an anonymous array in Java?
An array that is created without a variable name.
How do you initialize a 5x5 array?
int[][] array = new int[5][5];
Can an entire array be passed as a parameter to a method?
Yes, an array can be passed as a parameter
What is a jagged array?
An array of arrays with different number of columns
How is a jagged array declared in Java?
int array[][] = new int[3][]
What is this array called?
new int [] {10, 22, 44, 66}
Anonymous Array
Which statement won’t execute?
D
Array is called nums
How would we print 7?
System.out.print(nums[1][2]);
