Java Single Array Quiz

What is the syntax for declaring an array in Java?

• arrayName dataType;

• dataType[] arrayName;

• arrayName dataType[];

• arrayName[] dataType;

How do you initialize an array in Java?

• int[] myArray = new int();

• int[] myArray = new int[5];

• int[] myArray = new int[];

• int[] myArray = new int[0];

How do you access the third element in an array named 'numbers'?

• numbers[3]

• numbers[2]

• numbers[0]

• numbers[1]

What is the result of the following code? int[] numbers = {1, 2, 3, 4, 5}; System.out.println(numbers[2]);

How do you change the value of the second element in an array named 'names' to 'John'?

• names[1] = 'John'

• names[2] = 'John'

• names[1] = 'Jane'

• names[0] = 'John'

What is the output of the following code? int[] numbers = {1, 2, 3, 4, 5}; for (int i = 0; i < numbers.length; i++) { System.out.print(numbers[i] + " "); }

What is the output of the following code? int[] numbers = {5, 2, 8, 1, 9}; Arrays.sort(numbers); for (int i = 0; i < numbers.length; i++) { System.out.print(numbers[i] + " "); }

How do you find the length of an array named 'data'?

• data.size

• data.count

• data.length()

• data.length

What is the purpose of the 'length' property of an array in Java?

• To determine the number of elements in the array.

• To check if the array is empty.

• To access the last element of the array.

• To store the size of the array.

How do you sort an array in descending order in Java?

• Arrays.sort(array); Collections.reverse(Arrays.asList(array));

• Arrays.sort(array, Comparator.reverseOrder());

• Arrays.sort(array, Collections.reverse(Arrays.asList(array)));

• Arrays.sort(array, Collections.reverseOrder());