Same chapter3 marksDifficulty: Medium
What is an abstract class, and how does it differ from an interface in Java?
Inheritance and Polymorphism
3 marksDifficulty: Medium
Why does Java not allow a class to extend more than one class?
Original Khojo Papers practice question — not from a past board paper.
Answer
Multiple inheritance of classes creates the diamond problem: if two superclasses define the same member, the compiler cannot tell which the subclass should inherit. Java avoids the ambiguity by allowing only single inheritance of classes, and provides interfaces so that a class can still take on several types.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A class may implement any number of interfaces.
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