Q: Which of these keywords is used to inherit a class in Java?
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A
super
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B
this
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C
extends
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D
implements
C
Answer:
C
Explanation:
In Java, the extends keyword is used to indicate that one class is inheriting the properties and methods of another class. For example, public class SubClass extends SuperClass shows that SubClass inherits from SuperClass. Inheritance allows a class to use methods and fields from another class, promoting code reuse and logical hierarchies in object-oriented programming. This structure facilitates polymorphism and method overriding, which are essential features of Java's object-oriented paradigm. The implements keyword, on the other hand, is used when a class wants to implement an interface. super is used to refer to the immediate superclass, and this refers to the current instance of the class.
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Inheritance in Java (IS-A)