Practice Functional Interfaces (22.3) - Lambda Expressions and Functional Interfaces

Practice: Functional Interfaces

Lesson 22.3Lambda Expressions and Functional Interfaces

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8 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a functional interface?
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Think of the definition provided in class.
Question 2.
Provide an example of a functional interface.
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Recall the example discussed during the session.
3Question 3.
What is the defining characteristic of a functional interface?
- It can have multiple abstract methods
- It has one abstract method
- It's an interface with no methods
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Remember the definition discussed in class.
4Question 4.
True or False: You must always use the @FunctionalInterface annotation with functional interfaces.
- True
- False
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Think about the benefits of using it without it being strictly required.
Question 5.
Create a functional interface for a mathematical operation and implement it with a lambda expression to calculate the maximum of two numbers.
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Think about the conditional operations.
Question 6.
Explain in your own words the advantages of using functional interfaces and lambda expressions in Java.
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Consider how these features simplify the code structure.

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