Collections · interview question
What does the size() method of a HashMap return?
Multiple choiceEasychapter-4-curatedpremiumcollectionsmap-interface-and-hashmap
Answer and explanation
Correct answer
D. The number of key-value pairs in the map.
Why
The size() method returns the number of key-value pairs in the map, which is a direct measure of its current occupancy.
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…