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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does the filter() method do in a Stream?
💡 Hint: Think about what you're trying to achieve with the elements in the Stream.
Question 2
Easy
What type of operation is map()?
💡 Hint: Recall if it returns a Stream or a final result.
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 type of operation is the map() method?
- Intermediate
- Terminal
- Both
💡 Hint: Recall how the method affects the data flow.
Question 2
The collect() method is used for what purpose?
💡 Hint: Think about the final form you want the data to take.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Build a Stream operation that filters a list of integers to find the sum of all even numbers.
💡 Hint: Consider the condition that defines even numbers.
Question 2
Create a program that counts the number of unique words from a Stream of sentences.
💡 Hint: Use distinct() to handle unique entries and consider using flatMap for breaking sentences into words.
Challenge and get performance evaluation