Inheritance in Java is a powerful Object-Oriented Programming (OOP) feature that allows one class to acquire properties and behaviours of another. It promotes code reusability, method overriding, and enables hierarchical relationships between classes.
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Which of the following supports multiple inheritance in Java?
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Question 4 of 15
4. Question
What is the output of this code?
class A { int a = 10; } class B extends A { int b = 20; }
What does new B().a return?
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Question 5 of 15
5. Question
What is the base class of all Java classes?
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Question 6 of 15
6. Question
Which type of inheritance is not directly supported in Java classes?
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Question 7 of 15
7. Question
What is the purpose of the super keyword in Java?
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Question 8 of 15
8. Question
Which of these is true about constructor inheritance in Java?
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Question 9 of 15
9. Question
Can a subclass access private members of its superclass?
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Question 10 of 15
10. Question
What type of inheritance is this?
class A {} class B extends A {} class C extends B {}
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Question 11 of 15
11. Question
Can a class inherit from more than one class in Java?
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Question 12 of 15
12. Question
What is method overriding?
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Question 13 of 15
13. Question
Which access modifier allows inheritance to a subclass in another package?
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Question 14 of 15
14. Question
Which of the following allows reusability in Java?
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Question 15 of 15
15. Question
What is hierarchical inheritance?
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Summary
Inheritance in Java is a foundational OOP concept that allows classes to acquire behaviour and properties from other classes, leading to cleaner, modular, and reusable code. Java supports single, multilevel, and hierarchical inheritance using the `extends` and `implements` keywords.
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