Revision as of 17:28, 27 November 2007

COMP 1010 Home > Arrays

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Review Questions

Question 1

What is it called when you access an element outside of the bounds of an array.

Example

    int i[] = new int[3];
    i[4] = 3;

Question 2

What is it called when a for-loop loops one iteration too many such that it passes the array's bounds.

Example:

    int j;
    int array[] = new int[3];
    for (j = 0; j <= 3; j++) {
        array[j] = 0;
    }

Question 3

Does the second statement of following code copy an array?

int array1[]={2,4}
int array2[]=array1;

Question 4

Does the following piece of code compare two arrays?

int array1[]={1,3,4}
int array2[]={1,3,4}

if(array1=array2)
  System.out.println("SAME ARRAY");
else
  System.out.println("NOT THE SAME");

Question 5

Does the following piece of code change the value of i to "Hey"?

    String i = "Hello";
    String array[] = new String [20];
    array[10] = i;
    array[10] = "Hey";

Question 6

What does the following piece of code print to the screen?

    String s = "Gello";
    String h[] = new String [20];

    h[10] = s;
    s = "Jello";
    System.out.println(h[10]);

Exercises

Exercise 1

Write a program that calculates the product of all the values in an array.

Exercise 2

Write a program that finds the position of the smallest value in an array.

Exercise 3

Write an program to create and populate an array.

Exercise 4

Write a program to copy the contents of one array into another.

Exercise 5

Create a function to sort an array of integers.

Exercise 6

Write a program to print all of the values in an array.