Exam 7: Arrays and the Arraylist Class

What would be the results of the following code? int[] array1 = new int[25]; … // Code that will put values in array1 Int value = array1[0]; For (int a = 1; a < array1.length; a++) { If (array1[a] < value) Value = array1[a]; }

The ArrayList class is in this package.

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

Given the following two-dimensional array declaration, which statement is true? int [][] numbers = new int [6] [9];

If numbers is a two-dimensional int array that has been initialized and total is an int that has been set to 0, which of the following will sum all the elements in the array?

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

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:

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

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

What will be the value of x[1] after the following code is executed? int[] x = {22, 33, 44}; ArrayProcess(x); … Public static void arrayProcess(int[] a) { For(int k = 0; k < 3; k++) { A[k] = a[k] + 5; } }

In memory, an array of String objects

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

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

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; }

An array can hold multiple values of several different data types simultaneously.

What will be returned from the following method? public static float[] getValue(int x)

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

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.

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; }

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