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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a TreeMap in Java?
💡 Hint: Consider its name. What does 'tree' and 'map' imply?
Question 2
Easy
Can TreeMap have null keys?
💡 Hint: Think about how null might affect sorting.
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 kind of data structure does TreeMap use?
- Array
- LinkedList
- Red-Black Tree
- Hash Table
💡 Hint: Think about how TreeMap keeps its elements sorted.
Question 2
True or False: TreeMaps allow null keys.
- True
- False
💡 Hint: Recall the characteristics of TreeMap.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Create a TreeMap with several fruit names as keys and their corresponding prices as values. Write code to retrieve the price of a specific fruit and handle the case where the fruit does not exist.
💡 Hint: Consider how you check if a key exists in a map.
Question 2
Given a list of student scores, use a TreeMap to sort the scores and display them alongside their student names. Write appropriate code to achieve this.
💡 Hint: Remember: the key is the score and the value is the student's name.
Challenge and get performance evaluation