Practice Lambda Vs Anonymous Class (22.6) - Lambda Expressions and Functional Interfaces

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8 questions

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6 sample questions

Question 1.
What is a lambda expression?
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Think about how it can implement a functional interface.
Question 2.
How many methods can a lambda expression override?
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Consider the definition of functional interfaces.
3Question 3.
Which of the following statements is true?
- Lambda expressions require new class creation.
- Anonymous classes can override multiple methods.
- Both require explicit variable declaration.
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Consider method overriding capabilities.
4Question 4.
True or False: this in a lambda expression refers to the anonymous class instance.
- True
- False
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Think about scope of `this`.
Question 5.
Given a functional interface with more than one method, can a lambda implement it? Explain your reasoning.
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Recall the definition of functional interfaces.
Question 6.
Consider a scenario where performance is critical. Which would you choose, a lambda or an anonymous class? Justify your choice.
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Think of how each affects performance.

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