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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What data structure does ArrayList use to store its elements?
💡 Hint: Think about dynamic arrays.
Question 2
Easy
Can LinkedList store duplicate values?
💡 Hint: Remember the properties of a list.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the main feature of ArrayList?
- Random access
- Sorted order
- No duplicates
💡 Hint: Which structure offers quick access to its elements?
Question 2
True or False: A TreeMap allows null keys.
- True
- False
💡 Hint: Consider how keys are organized in the map.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Design a simple library management system that requires both a fast lookup of books by borrower (use HashMap) and a sorted list of books by title (use TreeSet).
💡 Hint: Use a combination of both collections to handle different requirements.
Question 2
You are tasked with creating a chat room application. Which collection structure would you prefer for storing messages sent (the order matters) and why? Consider using both ArrayList and LinkedList for message history.
💡 Hint: Think about how messages are added or removed during active conversations.
Challenge and get performance evaluation