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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the main difference between ArrayList and LinkedList?
💡 Hint: Think about how data is stored and accessed in each.
Question 2
Easy
What happens when you add a duplicate to a HashSet?
💡 Hint: Consider what HashSet's purpose is regarding duplicates.
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 primary use of a HashSet?
- To allow duplicates
- To store key-value pairs
- To retain unique elements
💡 Hint: Think about the properties of a set.
Question 2
True or False: An ArrayList can contain null values.
- True
- False
💡 Hint: Consider what data types can be stored.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Create a program that manages a list of students using ArrayList and allows adding/removing students. What happens if a student is added twice?
💡 Hint: Consider using a condition and a method to determine if the name already exists.
Question 2
Design a phone book application using a HashMap. How will you handle scenarios where a user tries to add an existing entry?
💡 Hint: Think of the scenarios where verification is necessary.
Challenge and get performance evaluation