15.5.3 - Common Methods
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Practice Questions
Test your understanding with targeted questions
What does the put method do in a Map?
💡 Hint: Think about what adding means in the context of storing values.
What will get('B') return if key 'B' does not exist in the Map?
💡 Hint: Consider the behavior of retrieving a value that isn't there.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the put method do in a Map?
💡 Hint: Think about adding new data vs. retrieving it.
True or False: The remove method returns null if the specified key does not exist in the Map.
💡 Hint: Consider the way removal works without altering the structure adversely.
1 more question available
Challenge Problems
Push your limits with advanced challenges
Write a Java program that simulates a simple phonebook using a Map. The program should allow adding, retrieving, and removing contact entries by phone number (key) and name (value).
💡 Hint: Think about how you would structure your Map and what methods you would include.
Challenge to optimize a real-world application (like a bookstore) using Maps. Outline how you would handle inventory management with key-value pairs.
💡 Hint: Reflect on how Maps can simplify data associations in complex applications.
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