5.6 - Functional Interfaces
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Practice Questions
Test your understanding with targeted questions
What is a functional interface?
💡 Hint: Look for the definition of functional interfaces in the previous sections.
Give an example of a functional interface used in Java.
💡 Hint: Think of the interfaces mentioned earlier.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is a functional interface?
💡 Hint: Recall the definition we discussed.
True or False: A Predicate can return any data type.
💡 Hint: What does Predicate do?
2 more questions available
Challenge Problems
Push your limits with advanced challenges
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.
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.
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