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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What collection do you use to store unique items?
💡 Hint: Think of a collection that prevents duplicates.
Question 2
Easy
Which collection type is better for fast random access?
💡 Hint: Consider collections based on arrays.
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
Which collection type would you use to hold a list of email addresses?
- ArrayList
- HashSet
- LinkedList
💡 Hint: You wouldn’t want duplicate email addresses.
Question 2
True or False: A HashMap can store duplicate keys.
- True
- False
💡 Hint: Think about key functionalities.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Design a class that keeps track of student grades. What collections would you choose for storing student names, grades, and ensuring that no student can have the same name? Justify your choices.
💡 Hint: Consider how you’ll want to access, store, and manage names and grades.
Question 2
You are building an event system where you need to manage attendees, ensure no duplicates, and sort them by initial registration. Which collections would you use and why?
💡 Hint: Think about order and uniqueness when selecting data structures.
Challenge and get performance evaluation