Arrays, Array iteration and the for-each loop

Question 1

What is the correct syntax for instantiating an array in Java using an array literal?

Answer 1

int[] myArray = {1,2,3}

Question 2

What error is thrown if an attempt is made to access an item at a position beyond the final index of an Array in Java?

Answer 2

ArrayIndexOutOfBoundsException

Question 3

True or False?

Once instantiated, Java Arrays have a fixed size.

Answer 3

True

Question 4

Given the following code, what would the value of the variable ‘vowel’ be?

char[] vowels = {‘a’,’e’,’i’,’o’,’u’};
char vowel = vowels[2];

Answer 4

i

Question 5

What is the property of a Java Array that gives the number of items in the array?

Answer 5

length

Question 6

Given an array named myArray, consider this syntax:

myArray[2]

Which of the following statements is true?

A. The syntax could be used, as part of a complete line of code, to retrieve an item in the array.

B. The syntax could be used, as part of a complete line of code, to set the value of an item in the array.

Answer 6

Both

Question 7

Given the code below, what is the highest index that could be used to access an item in the array?

String[] words = new String[9];

Answer 7

8

Question 8

What is a correct example of a valid ‘for each’ loop, given an array named bookArray?

Answer 8

for (String bookTitle: bookArray) {
    //do something
}

Question 9

True or False?

A Java ‘for each’ loop provides access to the index value of each item in the array as it is iterating.

Answer 9

False