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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a functional interface?
💡 Hint: Look for the definition of functional interfaces in the previous sections.
Question 2
Easy
Give an example of a functional interface used in Java.
💡 Hint: Think of the interfaces mentioned earlier.
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 exactly one abstract method
- An interface with no methods
💡 Hint: Recall the definition we discussed.
Question 2
True or False: A Predicate can return any data type.
- True
- False
💡 Hint: What does Predicate do?
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Create two functional interfaces: one that checks if a number is even and another that returns the square of a number. Implement both using lambda expressions.
💡 Hint: Use your knowledge of Predicate and Function interfaces.
Question 2
Design a Supplier that generates a random integer and a Consumer that accepts an integer and prints if it's odd or even. Implement both using lambda expressions.
💡 Hint: Remember that Suppliers don’t take arguments but give values, and Consumers act on given inputs.
Challenge and get performance evaluation