8.4 - Important Implementations
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Practice Questions
Test your understanding with targeted questions
What is the primary feature of an ArrayList?
💡 Hint: Think about if you can add more items beyond its initial size.
Can a HashSet contain duplicate elements?
💡 Hint: Remember what happens if you try to add the same item twice.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary benefit of using a HashSet?
💡 Hint: Think about what sets are traditionally used for.
True or False: An ArrayList can grow and shrink in size dynamically.
💡 Hint: Reflect on how you might add items without knowing the total.
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Challenge Problems
Push your limits with advanced challenges
Design a small program using ArrayList to manage a grocery list that allows adding, removing, and viewing items. How does the underlying structure support these operations?
💡 Hint: Consider how items are stored based on their positions.
Create a scenario using HashMap to link employee IDs with names. How would you ensure that data integrity is maintained?
💡 Hint: Think about how you would search for an employee in a directory.
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