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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the main advantage of using collections over arrays?
💡 Hint: Think about dynamic size and manipulation methods.
Question 2
Easy
Name one implementation of the List interface.
💡 Hint: List implementations are often ordered.
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 a key feature of a HashMap?
- It allows duplicate keys
- Each key is unique
- Values cannot be duplicated
💡 Hint: Remember how keys are organized in a map.
Question 2
True or False: A Set can contain duplicate elements.
- True
- False
💡 Hint: Consider the definition of a set.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Create a program that keeps track of unique student IDs and their names using HashSet and HashMap. What challenges might you encounter while using each?
💡 Hint: Think about how each data structure manages data differently.
Question 2
Design a scenario for an online shopping site where you would need to store items in an ordered, unique, and key-based manner. Specify which collections you would use and why.
💡 Hint: Consider the purpose of each action (viewing, quick access) in the design.
Challenge and get performance evaluation