Arrays

Which of the following is FALSE about arrays on Java

• A java array is always an object

• Length of array can be changed after creation of array

• Arrays in Java are always allocated on heap

What is the length of the following array: byte[] data = { 12, 34, 9, 0, -62, 88 };

• 1

• 5

• 6

• 12

How will you identify a single array?

• single curly brackets
• single square brackets
• multiple squares brackets
• single angled brackets

What are the legal indexes for the array ar, given the following declaration:

int[] ar = {2, 4, 6, 8 };

• 0, 1, 2, 3

• 1, 2, 3, 4

• 2, 4, 6, 8

• 0, 2, 4, 6

What does the following segment of code print out? int[] numArray = { 2, 7, 4, 12, 0, 2 };
System.out.println("Number: " + numArray[2]);

• Number: 2
• Number: 7
• Number: 4
• Number: 12

What does the following segment of code print out? int[] numArray = { 2, 7, 4, 12, 0, 2 };
System.out.println("Number: " + numArray[0]);

• Number: 2
• Number: 7
• Number: 4
• Number: 12

What does the following segment of code print out? int[] numArray = { 2, 7, 4, 12, 0, 2 };
System.out.println("Number: " + numArray[numArray.length - 1]);

• Number: 2
• Number: 0
• Number: 12
• Number: 6

What does the following segment of code print out? int[] numArray = { 2, 7, 4, 12, 0, 2 };
System.out.println(numArray.length);

• 4
• 5
• 6
• 7

What is the correct way to initialize an array with 10 positions?

• int numbers = new int[10];
• int[] numbers = new int[];
• int[10] numbers = new int[10];
• int[] numbers = new int[10];

What is the correct way to create an array with these three numbers: 12  8  15

• int[] = {12, 8, 15};
• int[] nums = {12  8  15};
• int[] nums = {12, 8, 15}
• int[] nums = {12, 8, 15};