Chapter 7 Quiz
A sorting algorithm is a technique for scanning through an array and rearranging its contents in some specific order.
True
An ArrayList object automatically expands in size to accommodate the items stored in it.
True
Objects in an array are accessed with subscripts, just like any other data type in an array.
True
To determine if two arrays are equal you must compare each of the elements of the two arrays.
True
Which of the following ArrayList class methods is used to insert an item at a specific location in an ArrayList?
add
The Java compiler will display an error message when it processes a statement that uses an invalid subscript.
False
The for-each loop is designed to let you look at both the values in an array and their indexes.
False
Given the following two-dimensional array declaration, which statement is true? int[][] numbers = new int[6][9];
The numbers array has 6 rows and 9 columns.
The sequential search algorithm
uses a loop to sequentially step through an array, starting with the first element
The binary search algorithm
will cut the portion of the array being searched in half each time it fails to locate the search value.
Which of the following import statements is required in order to use the ArrayList class?
import java.util.ArrayList;
If numbers is a two-dimensional array, which of the following would give the number of columns in row r?
numbers[r].length
Which statement would put the array "nums" into ascending order?
Arrays.sort(nums);
When an array is passed to a method
it is passed just as any other object would be passed.
Which of the following is a correct method header for receiving a two-dimensional array as an argument?
public static void passMyArray(int[][] myArray)
The ________ method removes an item from an ArrayList at a specific index.
remove
You can use the ________ method to replace an item at a specific location in an ArrayList.
set
Which method is used to determine the number of items stored in an ArrayList object?
size
A(n) ________ is used as an index to pinpoint a specific element within an array.
subscript
In order to do a binary search on an array
the array must first be sorted.