In Java, can a class implement an interface and extend an abstract class simultaneously?
A. Only if the class is marked as "final"
B. Only if both the interface and abstract class have the same methods
C. No, it is not allowed
D. Yes, a class can implement an interface and extend an abstract class
Answer: Option D
This Question Belongs to Java Program >> Interfaces And Abstract Classes
A. A contract specifying a set of methods that a class must implement
B. A class that cannot be instantiated
C. A class that contains only static methods
D. A subclass of the Object class
In Java, can a class implement multiple interfaces?
A. Interfaces cannot be implemented by classes
B. Only abstract classes can implement interfaces
C. No, a class can only implement one interface
D. Yes, a class can implement multiple interfaces
What is the purpose of an abstract class in Java?
A. To declare abstract methods
B. To provide a base class with common methods and fields
C. To make a class final
D. To declare abstract methods
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