4.2 - Advanced List and Set Manipulations
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Practice Questions
Test your understanding with targeted questions
What is the purpose of the Comparator interface?
💡 Hint: Think about how you would sort a list differently than its natural order.
How do you make a collection unmodifiable?
💡 Hint: Recall the Collections class in Java.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary use of the Comparator interface?
💡 Hint: Think about when you might need a different order.
True or False: All collections in Java can be modified.
💡 Hint: Remember the concept of immutability in collections.
1 more question available
Challenge Problems
Push your limits with advanced challenges
Create a custom comparator that sorts a list of Employee objects first by their salary in descending order, and then by their name in alphabetical order if salaries are equal. Write code to demonstrate this.
💡 Hint: Focus on how to prioritize the salary field first.
Discuss potential risks of using synchronized collections and propose best practices for their use.
💡 Hint: Think about what can go wrong when multiple threads are accessing shared data.
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