Collections · interview question
In which scenario is using an iterator preferred over an enhanced for loop?
Multiple choiceHardchapter-4-curatedpremiumcollectionsiteration-and-traversal
Answer and explanation
Correct answer
A. Traversing and modifying a list
Why
An iterator is preferred when you need to traverse and modify a list at the same time, as it provides a safe way to remove elements without causing a ConcurrentModificationException.
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…