Association in Java describes the relationship between two classes through their objects. It reflects how one object interacts or is connected with another without implying ownership. Mastering this concept is key to writing clean, modular object-oriented code.
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What is the difference between association and inheritance?
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Question 4 of 15
4. Question
Which is an example of association?
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Question 5 of 15
5. Question
In association, who owns the other object?
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Question 6 of 15
6. Question
What is One-to-Many association in Java?
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Question 7 of 15
7. Question
Which type of association is used in the below code?
class Library { List<Book> books; }
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Question 8 of 15
8. Question
Which of the following best describes Many-to-One association?
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Question 9 of 15
9. Question
What is required to implement association in Java?
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Question 10 of 15
10. Question
Can associated objects have different lifecycles in Java?
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Question 11 of 15
11. Question
What is the main benefit of association in Java?
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Question 12 of 15
12. Question
What is the output of this code?
class Car { Engine e = new Engine(); }
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Question 13 of 15
13. Question
Which of the following is NOT a valid type of association?
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Question 14 of 15
14. Question
What is the default visibility for object references used in association?
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Question 15 of 15
15. Question
Which is the most suitable reason to use association over inheritance?
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Summary
Association in Java is a core concept of Object-Oriented Programming where classes interact via object references without ownership. It supports relationships like one-to-one, one-to-many, many-to-one, and many-to-many, and is essential for building loosely coupled and maintainable systems.
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