Practice Collections And Generics (15) - Collections and Generics

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9 questions

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6 sample questions

Question 1.
What is a Collection in Java?
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Consider grouping items together.
Question 2.
Name one implementation of the List interface.
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Think of a dynamic-sized collection.
3Question 3.
What does a List in Java allow?
- Only unique elements
- Duplicates and ordering
- Only primitive types
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Think about sequences and repetitions.
4Question 4.
True or False: A Set in Java can contain duplicate elements.
- True
- False
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Consider the basic definition of a Set.
Question 5.
Given a list of integers, write a Java method that returns a Set of unique values. Discuss its advantages based on your understanding of Sets.
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Consider using HashSet's add() method.
Question 6.
Create a generic method that reverses an array of any type. Show how generics improve the flexibility of your code.
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Think about how the method should handle type parameters.

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