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Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the primary advantage of using a for-each loop?
💡 Hint: Think about simplicity and safety.
Question 2
Easy
What method would you use to check if there are more elements in an Iterator?
💡 Hint: It starts with 'has'.
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 is a method of the Iterator interface?
- next()
- collect()
- add()
💡 Hint: This method starts with 'n'.
Question 2
True or False: You can safely modify a collection while using a for-each loop.
- True
- False
💡 Hint: Think about the safety of the iteration process.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given a list of names, write a Java program that uses an Iterator to remove any name that starts with 'J' and print the remaining names.
💡 Hint: Use the startsWith() method to check the first letter.
Question 2
Create a program that uses both for-each and Iterator to gather elements from a list into two separate lists: one for names longer than 4 characters and another for shorter names.
💡 Hint: Evaluate the length of each name during iteration.
Challenge and get performance evaluation