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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define a functional interface and give an example in Java.
💡 Hint: Look for interfaces with a single method.
Question 2
Easy
What does a lambda expression allow you to do?
💡 Hint: Think of how it simplifies code!
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 is a functional interface?
- An interface with multiple abstract methods
- An interface with a single abstract method
- An interface that does not contain methods
💡 Hint: Think about the definition of functional interfaces.
Question 2
True or False: Lambda expressions can have multiple parameters.
- True
- False
💡 Hint: Recall the syntax of lambda expressions.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Create a functional interface to calculate the area of a rectangle and demonstrate its use using a lambda expression.
💡 Hint: Consider how parameters are passed to lambda expressions.
Question 2
Write a method using the Stream API to find the largest number in a list of integers using functional operations.
💡 Hint: Remember that `reduce` allows you to aggregate values.
Challenge and get performance evaluation