4. Data Collections

Implementing Arraylist Algorithms — Quiz

Test your understanding of implementing arraylist algorithms with 5 practice questions.

Practice Questions

Question 1

In an $ArrayList$, which method adds an element to the end of the list?

Question 2

What is the index of the first element in an $ArrayList$?

Question 3

What does the expression $list.size()$ return for an $ArrayList$ named $list$?

Question 4

Which statement correctly removes the element at index $2$ from an $ArrayList$ named $numbers$?

Question 5

What happens when the following code runs? ArrayList<Integer> nums = new ArrayList<Integer>(); nums.add(4); nums.add(7); nums.add(2); nums.remove(1);