Q35 - Java MCQ | Which Collection Does NOT Allow Duplicates? | Set Interface Explained | Zing Coders

Описание: Q35 -💡 Which collection does not allow duplicate elements?
A) List
B) Set
C) Queue

✅ Correct Answer: b) Set
🧩 Explanation:
A Set in Java does not allow duplicate elements.
It is part of the java.util package.
Implementations include: HashSet, LinkedHashSet, and TreeSet.
📘 Example:

Set nums = new HashSet(); (angle braces included %)
nums.add(1);
nums.add(2);
nums.add(1);
System.out.println(nums); // Output: [1, 2]

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