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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What method of TreeMap retrieves the least entry greater than or equal to a specified key?
💡 Hint: Look for a method that provides the next highest entry.
Question 2
Easy
Which map implementation maintains the order of insertion?
💡 Hint: Think about what type of access you would prefer with order.
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 of the following methods is provided by NavigableMap?
- firstKey()
- ceilingEntry(K key)
- size()
💡 Hint: Think about methods that relate to order.
Question 2
True or False: TreeMap allows null keys.
- True
- False
💡 Hint: Consider what would happen if two entries have undefined order.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You are maintaining a contact list using a TreeMap that requires quick retrieval of nearest contacts starting with a certain letter. Write code to demonstrate how you'd achieve that.
💡 Hint: What function can help retrieve contacts starting with a particular letter efficiently?
Question 2
Compare the efficiency of inserting 10,000 entries into a HashMap versus a TreeMap. Discuss the outcomes.
💡 Hint: Consider how the underlying structure impacts entry times.
Challenge and get performance evaluation