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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does the Set Interface prevent in a collection?
💡 Hint: Consider the unique nature of elements.
Question 2
Easy
What implementation of Set maintains the order of insertion?
💡 Hint: Think about how elements are added.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does the Set interface guarantee?
- Allows duplicates
- Does not allow duplicates
- Stores elements in order
💡 Hint: Think about what makes a Set different from a List.
Question 2
True or False: A LinkedHashSet preserves the insertion order.
- True
- False
💡 Hint: Recall how elements are organized.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You are building a contact application that must ensure that no duplicate emails exist. Which Set implementation would you choose and why?
💡 Hint: Think about access speed versus order preservation.
Question 2
Write a Java method that accepts a List of integers and returns a Set containing only the unique integers.
💡 Hint: Play with the HashSet constructor that takes a collection.
Challenge and get performance evaluation