Practice Best Practices (15.13) - Collections and Generics

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11 questions

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6 sample questions

Question 1.
What is the main advantage of using Generics in Java?
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Think of runtime errors related to types.
Question 2.
Why is it preferable to declare a List as List instead of ArrayList?
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Consider what happens when the implementation changes.
3Question 3.
What is the primary purpose of using Generics in Java?
- Enhance memory usage
- Increase type safety
- Improve runtime speed
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Think about errors you want to avoid.
4Question 4.
True or False: Using raw types can lead to ClassCastException.
- True
- False
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Consider what raw types actually do.
Question 5.
Write a generic method to find the maximum element in an array of any type.
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Consider how you would compare different elements.
Question 6.
Given a List of strings, write a function that uses Streams to convert all elements to uppercase.
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Think about the mapping function and how streams work.

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