Practice Summary (5.12) - Java Streams and Lambda Expressions

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11 questions

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6 sample questions

Question 1.
What is a Java Stream?
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Think about how streams process collections.
Question 2.
Define a Lambda Expression.
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Focus on the functional interface aspect.
3Question 3.
What is one characteristic of a Java Stream?
- It stores data
- It is a data structure
- It does not store data
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Think about the purpose of streams.
4Question 4.
Lambda Expressions are primarily used for which purpose in Java?
- To define data types
- To implement functional interfaces
- To create classes
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Consider what a functional interface is.
Question 5.
Given a list of integers, write a method that uses streams to return the sum of all even numbers.
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Think about filtering and then reducing.
Question 6.
Create a lambda expression that checks if a string contains at least one vowel.
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Consider how string matching works.

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