Chapter 7 Quiz + bit of Ch. 8

An array reference variable is used for what?

To access the elements in an array using an index

An anonymous array is what?

When a statement to create an array has no reference variable, such as new elementType[]{1, 2, 3, 4};

Are arrays objects in java?

Yes. Stored in heap

in double[] myList, what is the array?

myList. or, it is a variable referencing to an array.

How to obtain size of an array? the array is myList

myList.length

How to call the tenth index in myList with 10 elements?

myList[9] (from 0 to length - 1)

If an array is sorted, which is more efficient of a search? Binary or linear?

Binary

Which style works to declare array variables? elementType arrayRefVar[] elementType[] arrayRefVar

Both works. elementType[] arrayRefVar is preferred

Can you use the 'new' operator in an array-initializer?

No, syntax error.

What is an array?

Stores a fixed-size sequential collection of elements of the same type

How would one print an array? use myList[i]

System.out.println(myList[i] + " ");

Java treats a variable-length parameter as an array. T/F?

T

Once an array is created, its size is fixed. T/F?

T

When an array is passed to a method, a new array is created and passed to the method. T/F?

T

How would one print an array of the char[] type?

char[] city = {'N', 'a', 'b', 'i', 'l'}; System.out.println(city);

What would be the syntax for declaring an array variable? the element type is double and the array reference variable is called myList with 10 elements

double[] myList = new double[10];

What would the syntax of an array-initializer look like? array is myList and type is double. there are four elements.

double[] myList = {1, 2, 3, 4};

When a method returns an array, what is returned?

the reference of the array