Practice Syntax (1.3.1) - Functional Programming in Java

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10 questions

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4 cards from this section. Quick, good the night before a test.
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6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define a functional interface for a simple greeter method.
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Remember it should have a single abstract method.
Question 2.
Write a short lambda expression that prints 'Hello World!'
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Think of the basic structure of a lambda.
3Question 3.
What is a functional interface?
- An interface with multiple abstract methods
- An interface with one abstract method
- An interface without methods
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Remember the definition from our lessons.
4Question 4.
True or False: Lambda expressions can have multiple statements?
- True
- False
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Review the syntax of lambda expressions we discussed.
Question 5.
Design a simple functional interface for a multiplier and implement it using a lambda expression that takes two integers and returns their product.
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Think about the structure of a functional interface.
Question 6.
Create a list of strings and use a Stream API operation to find and print all strings that contain the letter 'a'.
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Use 'filter' to narrow down the strings.

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