Practice Syntax (1.2.1) - Functional Programming in Java

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10 questions

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6 sample questions

Question 1.
Define a functional interface and give an example in Java.
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Look for interfaces with a single method.
Question 2.
What does a lambda expression allow you to do?
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Think of how it simplifies code!
3Question 3.
What is a functional interface?
- An interface with multiple abstract methods
- An interface with a single abstract method
- An interface that does not contain methods
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Think about the definition of functional interfaces.
4Question 4.
True or False: Lambda expressions can have multiple parameters.
- True
- False
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Recall the syntax of lambda expressions.
Question 5.
Create a functional interface to calculate the area of a rectangle and demonstrate its use using a lambda expression.
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Consider how parameters are passed to lambda expressions.
Question 6.
Write a method using the Stream API to find the largest number in a list of integers using functional operations.
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Remember that `reduce` allows you to aggregate values.

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