Practice Lambda Expressions (1.3) - Functional Programming in Java

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8 questions

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6 sample questions

Question 1.
What is a lambda expression?
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Think about the syntax.
Question 2.
Write a lambda expression that prints 'Learning Java'.
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Remember the structure of a lambda expression.
3Question 3.
What is the primary purpose of a lambda expression in Java?
- To define a class
- To create an instance of a functional interface
- To shortcut for loops
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Think about what functional interfaces need for their implementation.
4Question 4.
Lambda expressions can take parameters.
- True
- False
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Refer back to how we defined lambda expressions.
Question 5.
Create a functional interface that defines a method to return the square of a number, and implement it using a lambda expression.
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Look at how you can pass the parameter to compute its square.
Question 6.
Write a lambda expression that filters a list of integers to return only even numbers, using the Stream API.
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What method is used to filter data in streams?

4 more questions in this section. Enroll free to practise them all.