Collections · interview question
What does calling list.set(1, 4) on an ArrayList containing [1, 2, 3] evaluate to?
Multiple choiceMediumchapter-4-curatedpremiumcollectionslist-interface-and-arraylist
ArrayList<Integer> list = new ArrayList<>(Arrays.asList(1, 2, 3));
list.set(1, 4);
System.out.println(list);Answer and explanation
Correct answer
D. [1, 4, 3]
Why
The set method replaces the element at the specified position in the list with the specified element. Here, the element at index 1 is replaced with 4, resulting in [1, 4, 3].
Test yourself on Collections
A free test with instant, explained results. No account needed.
More Collections questions
- Given a List<String> catalog, which method call on an Iterator<String> allows safe removal of an item during iteration?
- If you need to ensure that elements are processed in the exact order they are added but also need occasional access to…
- Given an e-commerce application that requires frequent updates and lookups of product prices, which collection would…
- Which operation is most efficient for an ArrayList?
- What will happen if you try to access an index in an ArrayList that is out of bounds?
- You need to store product IDs and ensure no duplicates, with the ability to retrieve them in sorted order. Which…