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Q
[Inheritance]

In single inheritance, which one of the following keywords should NOT be used?

ID: #24949 Competency focused Practice Questions ISC Class XII Computer Science 4 views

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#24949Q ID

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Competency focused Practice Questions ISC Class XII Computer ScienceTopic

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Correct Answer: Option D

[Inheritance]

In single inheritance, which one of the following keywords should NOT be used?

(a) extends

(b) this

(d) implements

Correct Answer: (d) implements

Single inheritance means one class inherits from another class.

class Parent { } class Child extends Parent { }

extends ✅
Used for inheritance between classes.
Example:
class Child extends Parent
this ✅
Refers to the current object. It can be used inside inherited classes.
super ✅
Used to refer to parent class members. Important in inheritance.
Example:
super.method();
implements ❌
Used for implementing interfaces, not for class inheritance.
Example:
class Test implements Runnable

Class Inheritance → uses extends Interface Implementation → uses implements

Since implements is not used for class inheritance, it should NOT be used in single inheritance.