Core Java · interview question
Which method would you use to efficiently check the presence of a key in a HashMap?
Multiple choiceMediumchapter-4-curatedpremiumcore-javacode-reading-with-collections
Answer and explanation
Correct answer
A. ContainsKey()
Why
The containsKey() method is specifically designed to check if a key exists in a HashMap, making it efficient and appropriate for this task.
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