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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What can the enhanced for-loop be used for?
💡 Hint: Think of a scenario where you just want to read elements.
Question 2
Easy
What does hasNext() do in an Iterator?
💡 Hint: Recall the method’s purpose in the iteration process.
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 method allows you to avoid managing indices while iterating?
- Iterator
- Enhanced For-Loop
- ListIterator
💡 Hint: Consider which method is specifically designed to streamline coding.
Question 2
True or False: You can use the remove() method with every iteration method.
- True
- False
💡 Hint: Think about what happens when you try to modify a collection directly.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write a program that uses an enhanced for-loop to print even numbers from an array of integers.
💡 Hint: Think of how to structure your loop to include a condition for even numbers.
Question 2
Demonstrate how to safely remove elements from an ArrayList while iterating using an Iterator.
💡 Hint: Remember, `remove()` must be called on the iterator, not the list directly.
Challenge and get performance evaluation