Java Chapter7

In memory, an array of String objects:

The binary search algorithm:

What do you call the number that is used as an index to pinpoint a specific element within an array?

This ArrayList class method is used to insert an item into an ArrayList.

It is common practice to use a ________ variable as a size declarator.

Given that String[] str has been initialized, to get a copy of str[0] with all characters converted to upper case, use the following statement:

If numbers is a two-dimensional array, which of the following would give the length of row r?

When an array is passed to a method:

You use this method to determine the number of items stored in an ArrayList object.

You can use this ArrayList class method to replace an item at a specific location in an ArrayList.

The ArrayList class is in this package.

When an individual element of an array is passed to a method:

In Java, you do not use the new operator when you use a(n):

What do you normally use with a partially-filled array?

Which of the following is a correct method header for receiving a two-dimensional array as an argument?

In order to do a binary search on an array:

This ArrayList class method deletes an item from an ArrayList.

Java performs ________, which means that it does not allow a statement to use a subscript that is outside the range of valid subscripts for the array.

Each array in Java has a public field named ________ that contains the number of elements in the array.

Which of the following is a valid declaration for a ragged array?

What would be the results after the following code was executed? int[] x = {23, 55, 83, 19}; int[] y = {36, 78, 12, 24}; x = y; y = x;

What will be the value of x[8] after the following code has been executed? final int SUB = 12; int[] x = new int[SUB]; int y = 100; for(int i = 0; i < SUB; i++) { x[i] = y; y += 10; }

What would be the results of the following code? int[] x = { 55, 33, 88, 22, 99, 11, 44, 66, 77 }; int a = 10; if(x[2] > x[5]) a = 5; else a = 8;

To return an array of long values from a method, use this as the return type for the method.

Declaring an array reference variable does not create an array. T or F?

To compare the contents of two arrays, you must compare the elements of the two arrays. T or F?

Objects in an array are accessed with subscripts, just like any other data type in an array. T or F?

Java does not limit the number of dimensions that an array may have. T or F?

Once an array is created, its size cannot be changed. True T or F?

When an array of objects is declared, but not initialized, the array values are set to null. T or F?

An ArrayList object automatically expands in size to accommodate the items stored in it .T or F?

The String[] args parameter in the main method header allows the program to receive arguments from the operating system command-line.T or F?

If a[] and b[] are two integer arrays, the expression a == b compares the array contents.T or F?

A sorting algorithm is used to locate a specific item in a larger collection of data. T or F?

Java limits the number of dimensions that an array may have to 15. T or F?

The sequential search algorithm:

A ragged array is:

If final int SIZE = 15 and int[] x = new int[SIZE], what would be the range of subscript values that could be used with x[]?

What would be the results after the following code was executed? int[] x = {23, 55, 83, 19}; int[] y = {36, 78, 12, 24}; for(int a = 0; a < x.length; a++) { x[a] = y[a]; y[a] = x[a]; }

The following statement creates an ArrayList object. What is the purpose of the notation? ArrayList arr = new ArrayList();

This indicates the number of elements, or values, the array can hold.

What is the value of scores[2][3] in the following array? int [] [] scores = { {88, 80, 79, 92}, {75, 84, 93, 80}, {98, 95, 92, 94}, {91, 84, 88, 96} };

Which of the statements are TRUE about the following code? final int ARRAY_SIZE = 10; long[] array1 = new long[ARRAY_SIZE];

For the following code, what would be the value of str[2]? String[] str = {"abc", "def", "ghi", "jkl"};

What will be the value of x[8] after the following code has been executed? final int SUB = 12; int[] x = new int[SUB]; int y = 20; for(int i = 0; i < SUB; i++) { x[i] = y; y += 5; }