Core Java · interview question
What will be the result of adding the same object twice to a HashSet?
Multiple choiceEasychapter-4-curatedpremiumcore-javaequals-and-hashcode-in-collections
Answer and explanation
Correct answer
D. The object will only appear once in the HashSet.
Why
A HashSet does not allow duplicate entries. If an attempt is made to add the same object twice, it will not be added again, ensuring that each object appears only once in the set.
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