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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What method would you use to collect elements into a list from a stream?
💡 Hint: Think about the method that gathers all elements.
Question 2
Easy
What is the purpose of the .filter() method in a stream?
💡 Hint: What do you need to do to exclude data?
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 method do you use to filter elements in a stream?
- filter()
- map()
- collect()
💡 Hint: Recall how to narrow down a stream.
Question 2
True or False: Collectors can only be used to gather data into lists.
- True
- False
💡 Hint: What types of collections can you think of?
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a list of names. Write a method that uses streams to filter out names starting with vowels and then group them by their length.
💡 Hint: Identify the starting character and think about length classification.
Question 2
Create a Stream that collects all unique ages from a list of people, filtering out duplicates and returning them in a sorted order.
💡 Hint: Focus on distinct() to remove duplicates and sorted() for ordering.
Challenge and get performance evaluation