Practice Built-in Functional Interfaces In Java.util.function (1.5)

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10 questions

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6 sample questions

Question 1.
What is a Predicate in Java?
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Think about functions that return true or false.
Question 2.
Provide an example of a Consumer.
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What does a Consumer do with its input?
3Question 3.
What does a Predicate do?
- Returns any value
- Filters values
- Evaluates to a boolean
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What type of values does a Predicate give?
4Question 4.
True or False: A Supplier takes an input parameter.
- True
- False
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Consider the definition of a Supplier.
Question 5.
Create a Predicate that evaluates if an input string starts with 'A'.
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Think about string methods that act on the starting character.
Question 6.
Implement a Function that takes a list of integers and returns a list of their squares.
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Use stream operations to transform the list.

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