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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the purpose of the Stream API in Java?
💡 Hint: Think about how it allows operations to be performed on collections.
Question 2
Easy
What is a lambda expression?
💡 Hint: Recall the syntax: (parameters) -> expression.
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 operation would you use to remove elements that do not meet a condition in a Stream?
- Map
- Filter
- Reduce
💡 Hint: Consider which operation narrows down the elements.
Question 2
True or False: Lambda expressions can express behaviors that are passed into methods.
- True
- False
💡 Hint: Think about the flexibility they provide in method parameters.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write a method that returns a List of squared values from an input List of integers using the Stream API.
💡 Hint: Think about what map will do with the elements.
Question 2
Using the Stream API, how would you count the total number of words in a list of sentences?
💡 Hint: Consider how to break down the sentences into their components.
Challenge and get performance evaluation