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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: Recall the definition in your readings.
Question 2
Easy
Give an example of a predefined functional interface.
💡 Hint: Think about what interfaces are found in java.util.function.
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
True or False: A functional interface can have multiple abstract methods.
- True
- False
💡 Hint: Think about the definition of a functional interface.
Question 2
Which of the following is a functional interface?
A) Runnable
B) Number
C) Random
- Runnable
- Number
- Random
💡 Hint: Recall the interfaces we covered.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Implement a custom functional interface for a comparator, then sort an array using a lambda expression that utilizes your interface.
💡 Hint: Think about how to compare two values.
Question 2
Design a functional interface that can be used for event handling in Java applications. Show its implementation in a button click action.
💡 Hint: How do you handle actions in Java GUI?
Challenge and get performance evaluation