Practice Best Practices - 22.13 | 22. Lambda Expressions and Functional Interfaces | Advanced Programming
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

Typing
Memory
Math
English Adventures
Knowledge

22.13 - Best Practices

Enroll to start learning

You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.

Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is a lambda expression?

💡 Hint: Think of it as a block of code you can pass around.

Question 2

Easy

Why should one avoid complex logic in lambdas?

💡 Hint: Consider how this impacts understanding the code at a glance.

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 key benefit of using built-in functional interfaces in Java?

  • They are configurable according to specific needs.
  • They enhance code readability and usability.
  • They reduce code redundancy.
  • They introduce complexity.

💡 Hint: Consider their role in standardizing code.

Question 2

True or False: We should implement complex business logic within lambdas.

  • True
  • False

💡 Hint: Reflect on the purpose of using lambdas.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Given an existing lambda expression that checks if a number is even and calculates its square, refactor it to separate the checking logic from the squaring logic. Rewrite the code to follow best practices.

💡 Hint: Look for opportunities to define functions that encapsulate logic.

Question 2

Convert a lambda expression that prints out contents of a list to use method reference syntax. Original: list.forEach(item -> System.out.println(item));.

💡 Hint: Identify the action being used in the lambda.

Challenge and get performance evaluation