ArrayList

Which is correct syntax to access an element of an ArrayList in Java?

• list.get(index)
• list[index]
• list.getElement(index)
• list.index

What does it mean for a list to be "dynamic"?

• You can easily add and remove elements
• It has a set size once it has been created
• It may contain multiple types of values
• You can access it from anywhere in the program

How do you get the number of elements in an ArrayList called "list" in Java?

• list.size();
• list.count();
• list.length();
• list.getSize();

The _________ method will return the total elements in an ArrayList.

• total()
• length()
• size()
• length

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 is the list nums if it is initially [5, 3, 1] and the following code is executed?

nums.add(6);

nums.add(0, 4);

nums.remove(1);

• [4, 3, 1, 6]

• [5, 3, 1, 6]

• [4, 3, 6]

• [4, 5, 3, 6]

Which statement below is the correct way to retrieve the first element in the nums ArrayList?

• nums.get(0)

• nums[0]

• nums(0)

• nums[1]

Given the nums ArrayList with the values [5, 4, 3, 2], what statement below removes the value 3 from the list?

• nums.remove(2)

• nums.remove(3)

• nums.get(2) = null

• nums.remove(1)

What will print when the following code executes?

ArrayList<Integer> list = new ArrayList<Integer>();

list.add(7);

list.add(8);

list.add(9);

System.out.println(list.remove(0));

• 7

• 8

• 9

• 0

Which statement is the correct declaration and initialization of an ArrayList of String values?

• ArrayList<String> name;

  name = new ArrayList<String>();

• ArrayList name;

  name = new ArrayList<String>();

• ArrayList<String> name;

  name = ArrayList<String>();

• String<ArrayList> name;

  name = new String<ArrayList>();