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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does an Iterator do?
💡 Hint: Think about how you move through a line of people.
Question 2
Easy
What operation would you use to print each element in a list?
💡 Hint: Remember the action to perform for each item.
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 does the removeIf method do in a collection?
- It adds elements to the collection.
- It updates all elements.
- It removes elements that match a condition.
💡 Hint: Think about filtering out elements.
Question 2
True or False: The ListIterator can only traverse a list in one direction.
- True
- False
💡 Hint: Consider how people can move in a room.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Create a custom class and demonstrate the use of an Iterator to traverse through a collection of objects of that class, printing their properties.
💡 Hint: Focus on object-oriented design.
Question 2
Given a list of integers, use the replaceAll and removeIf methods to first delete all even numbers and then square all the remaining odd numbers.
💡 Hint: Think about filtering and transforming in one go.
Challenge and get performance evaluation