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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a Map in Java?
💡 Hint: Think of examples like dictionaries or address books.
Question 2
Easy
Name one implementation of the Map interface.
💡 Hint: Recall the different types we discussed.
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 implementations allows null keys?
- HashMap
- Hashtable
- TreeMap
💡 Hint: Think about the restrictions for keys.
Question 2
True or False: A LinkedHashMap maintains the order of elements.
- True
- False
💡 Hint: Recall how LinkedHashMap stores elements.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Design a small phone book application using HashMap, where the name is the key and the phone number is the value. Show how you would add and retrieve entries.
💡 Hint: Think about defining your map and using put/get methods.
Question 2
You are required to create a voting system that keeps track of the number of votes each candidate receives. Use a TreeMap where the candidate names are keys and the votes are values. How would you implement the updating mechanism?
💡 Hint: Reflect on how you'd maintain order and update the values.
Challenge and get performance evaluation