15.5.2 - Implementations
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Practice Questions
Test your understanding with targeted questions
What is the primary reason for using a Map in Java?
💡 Hint: Think about how we access stored data.
Can a HashMap contain null values?
💡 Hint: Consider what kind of data structures allow nulls.
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Interactive Quizzes
Quick quizzes to reinforce your learning
Which of the following implementations of Map does not allow null keys?
💡 Hint: Think about which implementation is synchronized.
True or False: TreeMap maintains the order of elements based on their natural ordering.
💡 Hint: Reflect on how elements are stored in an ordered fashion.
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Challenge Problems
Push your limits with advanced challenges
You are building a contact management application. Which Map implementation would you choose and why?
💡 Hint: Think about how contacts are accessed.
Data from a large data set must be stored in a sorted manner for quick retrieval. Which implementation should be chosen?
💡 Hint: Consider how data will be organized and accessed.
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