Exam 7: Arrays and the Arraylist Class

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

The binary search algorithm

What would be the result of executing the following code? int[ ] x = {0, 1, 2, 3, 4, 5};

A sorting algorithm is a technique for scanning through an array and rearranging its contents in some specific order.

A search algorithm

When an array of objects is declared but not initialized, the array values are set to 0.

A(n) __________ is used as an index to pinpoint a specific element within an array.

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

Which of the following ArrayList class methods is used to insert an item at a specific location in an ArrayList?

What will be the result after the following code is executed? final int ARRAY_SIZE = 5; Float[ ] x = float[ARRAY_SIZE]; For (i = 1; i <= ARRAY_SIZE; i++) { X[i] = 10.0; }

An ArrayList object automatically expands in size to accommodate the items stored in it.

Which of the following import statements is required in order to use the ArrayList class?

A partially filled array is normally used

Any items typed on the command-line, separated by space, after the name of the class, are considered to be one or more arguments that are to be passed into the main method.

To determine if two arrays are equal you must compare each of the elements of the two arrays.

The __________ method removes an item from an ArrayList at a specific index.

When an array is passed to a method

Java provides a mechanism known as a __________ which makes it possible to write a method that takes a variable number of arguments.

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

What does the following statement do? double[ ] array1 = new double[10];