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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: Think about how they relate to lambda expressions.
Question 2
Easy
Name one predefined functional interface in Java.
💡 Hint: Consider interfaces used in multitasking or GUI programming.
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 one abstract method
- An abstract class
💡 Hint: Remember the definition of a functional interface.
Question 2
True or False: Runnables can return a value.
- True
- False
💡 Hint: Think of the method signature of Runnable.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Implement a custom Comparator for sorting integers in descending order and demonstrate its usage with a list of integers.
💡 Hint: How do you reverse the natural order?
Question 2
Write a small program using both Runnable and Callable, demonstrating the differences in their functionality.
💡 Hint: What does each method return or do when executed?
Challenge and get performance evaluation