15.3.2 - Implementations
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Practice Questions
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What is a HashSet in Java?
💡 Hint: Think about its fast retrieval capabilities.
Which implementation retains insertion order?
💡 Hint: It includes 'linked' in its name!
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Interactive Quizzes
Quick quizzes to reinforce your learning
Which of the following allows duplicate elements?
💡 Hint: Remember that all sets are distinct by their nature.
True or False: LinkedHashSet also does not allow duplicates.
💡 Hint: Think about what makes a Set a Set.
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Challenge Problems
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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.
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.
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