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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a HashSet in Java?
💡 Hint: Think about its fast retrieval capabilities.
Question 2
Easy
Which implementation retains insertion order?
💡 Hint: It includes 'linked' in its name!
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
Which of the following allows duplicate elements?
- HashSet
- Set interface
- TreeSet
💡 Hint: Remember that all sets are distinct by their nature.
Question 2
True or False: LinkedHashSet also does not allow duplicates.
- True
- False
💡 Hint: Think about what makes a Set a Set.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Create a class that maintains a list of unique email addresses using a HashSet. Also, explain potential issues if duplicates are added.
💡 Hint: Consider the importance of unique identifiers in email systems.
Question 2
Design an application that uses TreeSet for storing student grades, ensuring they are sorted. Discuss the trade-offs of performance.
💡 Hint: Think about how sorting enhances the usability of grade listings.
Challenge and get performance evaluation